CN204758680U - Ac bus sampling circuit - Google Patents
Ac bus sampling circuit Download PDFInfo
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- CN204758680U CN204758680U CN201520496747.0U CN201520496747U CN204758680U CN 204758680 U CN204758680 U CN 204758680U CN 201520496747 U CN201520496747 U CN 201520496747U CN 204758680 U CN204758680 U CN 204758680U
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Abstract
The utility model belongs to the technical field of the electronic technology and specifically relates to an ac bus sampling circuit of simple reasonable, job stabilization, its characterized in that is equipped with attenuator circuit, clamp circuit, current -limiting circuit, and wherein attenuator circuit's output and clamp circuit's input is connected, and clamp circuit's output is connected with the input of current -limiting circuit, be equipped with rectifier diode among the clamp circuit, be equipped with current -limiting resistor and filter capacitance in the current -limiting circuit for the completion is handled current -limiting, the filtering of signal, compared with the prior art, the utility model, having rational in infrastructure, job stabilization, can monitoring the generating line in real time rapidly and exchange the situation of change, effectual reduce cost practices thrift the PCB space, advantage that various fields etc. Be applied to that can be extensive are showing.
Description
Technical field
The utility model relates to electronic technology field, specifically the ac bus sample circuit of a kind of advantages of simple, working stability.
Background technology
Each field that current automatic control technology is deeply social, people more and more depend on the facility that automatic control technology is brought in daily production, life, but the system contained due to automatic control technology itself is more, terminal is a system integration scheme, the AC and DC related to, simulation, digital signal are a lot, will inevitably relate to sampling and the detection of interchange or bus signal, detection mode traditional is at present: 1, detect AC signal by various sensor, mutual inductor module.2, by light-coupled isolation, utilize the break-make of optocoupler to detect AC signal.
The main shortcoming of these two modes is by the mode such as sensor and mutual inductor system cost expensive, owing to need adopt large scale telefault so higher for structure space requirement, be unfavorable for application in the little spatial dimension of present small size, the detection of optocoupler break-make is utilized to there is detection signal asynchronous, reaction velocity is slow, the shortcomings such as high expensive.
Summary of the invention
The utility model is for the shortcoming and defect existed in prior art, and proposing one, can to realize peripheral components few, with low cost, reliable ac bus sample circuit.
The utility model can be reached by following measures:
A kind of ac bus sample circuit, it is characterized in that being provided with attenuator circuit, clamping circuit, current-limiting circuit, wherein the output terminal of attenuator circuit is connected with the input end of clamping circuit, and the output terminal of clamping circuit is connected with the input end of current-limiting circuit.
Commutation diode is provided with in clamping circuit described in the utility model.
Current-limiting resistance and filter capacitor is provided with, for current limliting, the filtering process of complete pair signals in current-limiting circuit described in the utility model.
The utility model in use; first ac signal on ac bus decays through attenuator circuit; then through clamping circuit by input voltage clamper within the scope of MCU safe voltage; eventually pass current-limiting circuit and current-limiting protection is carried out to input signal; directly sample in AC signal, attenuator circuit is by 1206 encapsulation Chip-Rs, and clamping circuit adopts commutation diode; current-limiting circuit adopts resistance, and current limliting is after filter capacitor filtering interfering over the ground, and directly feeding MCU detects.
The utility model, relative to prior art, has rational in infrastructure, working stability, can monitor rapidly bus in real time and exchange situation of change, effectively reduce cost and save PCB space, can be widely used in the significant advantages such as various fields.
accompanying drawing illustrates:
Accompanying drawing 1 is structured flowchart of the present utility model.
Accompanying drawing 2 is a kind of circuit structure diagrams of the present utility model.
Reference numeral: attenuator circuit 1, clamping circuit 2, limiting filter circuit 3.
embodiment:
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in accompanying drawing 1 and accompanying drawing 2, the utility model proposes a kind of ac bus sampling testing circuit, it is characterized in that being provided with attenuator circuit 1, clamping circuit 2, limiting filter circuit 3, wherein exchange input to be connected with attenuator circuit, then connect clamping circuit, eventually pass after current-limiting circuit carries out current limliting and filtering process and export.
The utility model is decayed to AC signal by two resistance, then clamper is carried out by two diodes, clamp voltage is input MCU safe voltage, MCU port is sent into after current-limiting resistance and filter capacitor carry out current limliting and filtering over the ground, the utility model application reasonable in design is simple, reliable, can monitor rapidly bus in real time and exchange situation of change, effectively reduce cost and save PCB space, various field can be widely used in.
The utility model, relative to prior art, has rational in infrastructure, working stability, can monitor rapidly bus in real time and exchange situation of change, effectively reduce cost and save PCB space, can be widely used in the significant advantages such as various fields.
Claims (3)
1. an ac bus sample circuit, it is characterized in that being provided with attenuator circuit, clamping circuit, current-limiting circuit, wherein the output terminal of attenuator circuit is connected with the input end of clamping circuit, and the output terminal of clamping circuit is connected with the input end of current-limiting circuit.
2. a kind of ac bus sample circuit according to claim 1, is characterized in that being provided with commutation diode in described clamping circuit.
3. a kind of ac bus sample circuit according to claim 1, is characterized in that being provided with current-limiting resistance and filter capacitor in described current-limiting circuit, for current limliting, the filtering process of complete pair signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520496747.0U CN204758680U (en) | 2015-07-10 | 2015-07-10 | Ac bus sampling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520496747.0U CN204758680U (en) | 2015-07-10 | 2015-07-10 | Ac bus sampling circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204758680U true CN204758680U (en) | 2015-11-11 |
Family
ID=54473375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520496747.0U Active CN204758680U (en) | 2015-07-10 | 2015-07-10 | Ac bus sampling circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204758680U (en) |
-
2015
- 2015-07-10 CN CN201520496747.0U patent/CN204758680U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |