CN212846429U - Control circuit for outputting digital signals by adopting resistance sampling - Google Patents
Control circuit for outputting digital signals by adopting resistance sampling Download PDFInfo
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- CN212846429U CN212846429U CN202021639126.0U CN202021639126U CN212846429U CN 212846429 U CN212846429 U CN 212846429U CN 202021639126 U CN202021639126 U CN 202021639126U CN 212846429 U CN212846429 U CN 212846429U
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Abstract
The utility model belongs to the technical field of the resistance signal sampling technique and specifically relates to an adopt resistance sampling to carry out control circuit of digital signal output, including rectifier bridge heap, sampling circuit and processing module, external power source is connected to rectifier bridge heap's input, and processing module includes controller and treater, and the output of the input connection treater of controller, sampling circuit includes voltage sampling circuit and current sampling circuit, and voltage sampling circuit is including the first resistance and the second resistance of establishing ties, and current sampling circuit includes sampling resistor, and sampling resistor and external load's junction is connected with another input of treater, the utility model discloses a mode that resistance was gathered carries out digital conversion output digital signal through MCU to the signal of gathering, and control chip carries out power processing through the digital signal who accepts.
Description
Technical Field
The utility model relates to a resistance signal sampling technical field, concrete field is an adopt resistance sampling to carry out digital signal output's control circuit.
Background
At present power control device, current, voltage are handled and are all carried out the collection of signal through current transformer or voltage transformer and directly carry out power processing, and voltage transformer, current transformer output signal uniformity are poor, and the mode of gathering through the resistance now carries out digital conversion output digital signal to the signal of gathering through MCU, and control chip carries out power processing through the digital signal who accepts.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide an adopt resistance sampling to carry out digital signal output's control circuit.
In order to achieve the above object, the utility model provides a following technical scheme: a control circuit for outputting digital signals by adopting resistance sampling comprises a rectifier bridge stack, a sampling circuit and a processing module, wherein the input end of the rectifier bridge stack is connected with an external power supply, the output end of the rectifier bridge stack outputs a power supply, the processing module comprises a controller and a processor, the input end of the controller is connected with the output end of the processor, the sampling circuit comprises a voltage sampling circuit and a current sampling circuit, the voltage sampling circuit comprises a first resistor and a second resistor which are connected in series, one end of the first resistor, which is far away from the second resistor, is connected with the output end of the rectifier bridge stack, one end of the second resistor, which is far away from the first resistor, is grounded, a connecting point between the first resistor and the second resistor is connected with one input end of the processor, the current sampling circuit comprises a sampling resistor, one end of the sampling resistor is connected in series with the negative end of an external load, the other end of the sampling resistor is grounded, and the connecting point of the sampling resistor and the external load is connected with the other input end of the processor.
Preferably, the controller is a power control chip, and an output control end of the power control chip is connected with a power voltage control end of an external power supply.
Preferably, the processor is an MCU processing chip, and the MCU processing chip receives analog signals of the sampled voltage and current and outputs voltage and current numerical signals after processing.
Preferably, the voltage sampling circuit and the current sampling circuit are both provided with filter capacitors, the filter capacitors on the voltage sampling circuit are connected in parallel to the second resistor, and the filter capacitors on the current sampling circuit are connected in parallel to the sampling resistor.
Preferably, the sampling resistor is a sampling Rsensor resistor.
Compared with the prior art, the beneficial effects of the utility model are that: through the mode of resistance collection, carry out digital conversion output digital signal to the signal of gathering through MCU, control chip carries out power processing through the digital signal who receives.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
In the figure: 1. a rectifier bridge stack; 2. a controller; 3. a processor; 4. a first resistor; 5. a second resistor; 6. sampling a resistor; 7. and a filter capacitor.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a control circuit for outputting digital signals by adopting resistance sampling comprises a rectifier bridge stack, a sampling circuit and a processing module, wherein the input end of the rectifier bridge stack is connected with an external power supply, the output end of the rectifier bridge stack outputs a power supply, the processing module comprises a controller and a processor, the input end of the controller is connected with the output end of the processor, the sampling circuit comprises a voltage sampling circuit and a current sampling circuit, the voltage sampling circuit comprises a first resistor and a second resistor which are connected in series, one end of the first resistor, which is far away from the second resistor, is connected with the output end of the rectifier bridge stack, one end of the second resistor, which is far away from the first resistor, is grounded, a connecting point between the first resistor and the second resistor is connected with one input end of the processor, the current sampling circuit comprises a sampling resistor, one end of the sampling resistor is connected in series with the negative end of an external load, the other end of the sampling resistor is grounded, and the connecting point of the sampling resistor and the external load is connected with the other input end of the processor.
The controller is a power supply control chip, and an output control end of the power supply control chip is connected with a power supply voltage control end of an external power supply.
The processor is an MCU processing chip, and the MCU processing chip receives analog signals of sampled voltage and current and outputs voltage and current numerical value signals after processing.
And the voltage sampling circuit and the current sampling circuit are both provided with filter capacitors, the filter capacitors on the voltage sampling circuit are connected in parallel to the second resistor, and the filter capacitors on the current sampling circuit are connected in parallel to the sampling resistor.
The sampling resistor is a sampling Rsensor resistor.
Through this technical scheme, after the electricity was gone up, the AC power passed through rectifier bridge and piled the rectification, and first resistance and second resistance partial pressure input carry out voltage signal and gather to MCU's port, and load resistance and sampling Rsensor resistance carry out the partial pressure and input to MCU's port and carry out current signal and gather.
The MCU carries out software compensation algorithm processing on the acquired current and voltage signals, converts the corresponding signals into digital signals, and then outputs the current voltage and current digital signals to a control chip IC1 of the MCU for use through a digital output port.
The MCU collects voltage or current signals through the resistor, processes the collected signals through a built-in software compensation algorithm, outputs digital signals, can improve the consistency of signal output, the precision of the signals and the authenticity of data, and is convenient for the digital signal control chip to process the data.
The precision of the current transformer and the precision of the voltage transformer can be improved through resistance acquisition, digital signals are output, the use is simple, and the anti-interference performance is good.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A control circuit for digital signal output by resistance sampling is characterized in that: comprises a rectifier bridge stack, a sampling circuit and a processing module, wherein the input end of the rectifier bridge stack is connected with an external power supply, the output end of the rectifier bridge stack outputs a power supply, the processing module comprises a controller and a processor, the input end of the controller is connected with the output end of the processor, the sampling circuit comprises a voltage sampling circuit and a current sampling circuit, the voltage sampling circuit comprises a first resistor and a second resistor which are connected in series, one end of the first resistor, which is far away from the second resistor, is connected with the output end of the rectifier bridge stack, one end of the second resistor, which is far away from the first resistor, is grounded, a connecting point between the first resistor and the second resistor is connected with one input end of the processor, the current sampling circuit comprises a sampling resistor, one end of the sampling resistor is connected in series with the negative end of an external load, the other end of the sampling resistor is grounded, and the connecting point of the sampling resistor and the external load is connected with the other input end of the processor.
2. The control circuit of claim 1, wherein the control circuit is configured to output a digital signal using resistive sampling, and further comprising: the controller is a power supply control chip, and an output control end of the power supply control chip is connected with a power supply voltage control end of an external power supply.
3. The control circuit of claim 1, wherein the control circuit is configured to output a digital signal using resistive sampling, and further comprising: the processor is an MCU processing chip, and the MCU processing chip receives analog signals of sampled voltage and current and outputs voltage and current numerical value signals after processing.
4. The control circuit of claim 1, wherein the control circuit is configured to output a digital signal using resistive sampling, and further comprising: and the voltage sampling circuit and the current sampling circuit are both provided with filter capacitors, the filter capacitors on the voltage sampling circuit are connected in parallel to the second resistor, and the filter capacitors on the current sampling circuit are connected in parallel to the sampling resistor.
5. The control circuit according to claim 4, wherein the control circuit for outputting digital signals by using resistance sampling comprises: the sampling resistor is a sampling Rsensor resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021639126.0U CN212846429U (en) | 2020-08-08 | 2020-08-08 | Control circuit for outputting digital signals by adopting resistance sampling |
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| CN202021639126.0U CN212846429U (en) | 2020-08-08 | 2020-08-08 | Control circuit for outputting digital signals by adopting resistance sampling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113691275A (en) * | 2021-09-09 | 2021-11-23 | 苏州汇川控制技术有限公司 | Digital signal transmission circuit and digital signal transmission device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113691275A (en) * | 2021-09-09 | 2021-11-23 | 苏州汇川控制技术有限公司 | Digital signal transmission circuit and digital signal transmission device |
| CN113691275B (en) * | 2021-09-09 | 2023-07-25 | 苏州汇川控制技术有限公司 | Digital signal transmission circuit and digital signal transmission device |
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