CN216526808U - Digital signal acquisition and control circuit - Google Patents
Digital signal acquisition and control circuit Download PDFInfo
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- CN216526808U CN216526808U CN202122914200.6U CN202122914200U CN216526808U CN 216526808 U CN216526808 U CN 216526808U CN 202122914200 U CN202122914200 U CN 202122914200U CN 216526808 U CN216526808 U CN 216526808U
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Abstract
The present disclosure relates to a digital signal acquisition and control circuit, comprising: a control module; a photoelectric coupler; the input end of the digital signal acquisition module is used for acquiring digital signals, and the output end of the digital signal acquisition module is in signal connection with the input end of the photoelectric coupler; the output end of the photoelectric coupler is connected with the input end of the control module; the output end of the control module is connected with the input end of the driving module; the output end of the driving module is connected with the input end of the switch module, and the driving module is used for driving the switch module to be switched on and off according to the output signal of the control module; and the power supply module is electrically connected with the control module and used for supplying power to the control module. The input end and the output end of the digital signal acquisition and control circuit are electrically isolated through the photoelectric coupler, signal crosstalk between the input end and the output end can be avoided, and stability of the working process of the digital signal acquisition and control circuit is improved.
Description
Technical Field
The disclosure relates to the technical field of digital signal acquisition circuits, in particular to a digital signal acquisition and control circuit.
Background
A digital signal means that the independent variable is a discrete, dependent variable is also a discrete signal, the independent variable of such a signal is represented by an integer, and the dependent variable is represented by one of finite numbers. The digital signal acquisition circuit is a circuit for performing centralized acquisition processing on digital signals and then controlling the switching element to drive external equipment. The existing digital signal acquisition circuit mostly adopts a four-in four-out and eight-in eight-out structure, namely, the circuit is provided with four (or eight) input ends and four (or eight) corresponding output ends, each input end corresponds to one output end, after the digital signals are acquired by the input ends, the digital signals are processed and converted by a control module, then the corresponding output ends are controlled to output control instructions, and a switch element is controlled to enable external equipment to execute corresponding functional operation. The existing digital signal acquisition circuit mainly has the following defects in the use process, the input end of a digital signal and the output end of a control module are in a common-ground structure, and the input end and the output end are not mutually isolated, so that mutual interference of input and output signals can be caused, and the stability of the digital signal acquisition circuit is influenced; on the other hand, the structure that n enters and n exits is too fixed, and diversified use requirements in the actual use process are difficult to meet.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the prior art, the present disclosure is directed to a digital signal acquisition and control circuit. The input end and the output end of the digital signal acquisition and control circuit are electrically isolated through the photoelectric coupler, signal crosstalk between the input end and the output end can be avoided, and stability of the working process of the digital signal acquisition and control circuit is improved.
This disclosure a digital signal gathers and control circuit, include:
a control module;
a photoelectric coupler;
the input end of the digital signal acquisition module is used for acquiring digital signals, and the output end of the digital signal acquisition module is in signal connection with the input end of the photoelectric coupler; the output end of the photoelectric coupler is connected with the input end of the control module;
the output end of the control module is connected with the input end of the driving module;
the output end of the driving module is connected with the input end of the switch module, and the driving module is used for driving the switch module to be switched on and off according to the output signal of the control module;
and the power supply module is electrically connected with the control module and used for supplying power to the control module.
Preferably, the control module comprises an FM33 series MCU.
Preferably, the digital signal acquisition module includes n acquisition channels, each acquisition channel includes a positive input end and a negative input end, and the positive input end and the negative input end are respectively connected to two ends of an input diode of the photoelectric coupler; n is ≧ 2.
Preferably, the driving module includes a darlington array driving chip ULN 2003.
Preferably, the switch module includes 2n switch elements, and a control terminal of each switch element is in signal connection with one output pin of the darlington array driver chip ULN 2003.
Preferably, said n-5; the number of the Darlington array driving chips ULN2003 is 2; the switch is a relay.
Preferably, the switch module further comprises:
the number of the indicator lamps is matched with that of the switch pieces, and each indicator lamp is in signal connection with one output pin of the Darlington array driving chip ULN2003 and is used for indicating the on-off state of each switch piece.
Preferably, the power supply module includes:
a Buck voltage reduction unit;
a voltage stabilization unit; the voltage input end of the Buck voltage reduction unit is used for accessing external voltage, and the voltage output end of the Buck voltage reduction unit is electrically connected with the voltage input end of the voltage stabilization unit; and the voltage output end of the voltage stabilizing unit is electrically connected with the voltage input end of the control module.
Preferably, the digital signal acquisition and control circuit further comprises:
and the communication module is in communication connection with the control module and is used for communicating with external equipment.
Preferably, the digital signal acquisition and control circuit further comprises:
and the signal output end of the temperature detection module is in signal connection with the signal input end of the control module.
The digital signal acquisition and control circuit has the advantages that:
1. according to the digital signal acquisition module, an externally acquired digital signal is input into the control module through the photoelectric coupler, the control module receives the input digital signal and then performs recognition conversion, and then the drive module drives the switch module to be switched on and off to control external equipment to execute corresponding functional operation. The photoelectric coupler can realize the signal conversion of electricity-light-electricity and can realize the complete electrical isolation of the input end and the output end, thus avoiding the phenomenon of signal crosstalk between the input signal and the output signal, stabilizing the signal acquisition input and output processes and improving the stability of the digital signal acquisition and control circuit in the working process;
2. this is disclosed drives the break-make of switch spare as drive module through setting up Darlington array driver chip ULN2003, and then controls external equipment's operation, can provide multichannel drive signal output, can realize 5 way inputs, the structure of 10 way outputs, can satisfy diversified user demand in the in-service use, and use drive module drive switch spare's structure, can make switch spare on-off control stable, have the advantage that current gain is high, operating voltage is high simultaneously.
Drawings
Fig. 1 is a block diagram of a digital signal acquisition and control circuit according to the present disclosure;
FIG. 2 is a circuit diagram of the control module of the present disclosure;
FIG. 3 is a circuit diagram of a photocoupler and digital signal acquisition module according to the present disclosure;
FIG. 4 is a circuit diagram of the driver module and the switch module of the present disclosure;
FIG. 5 is a circuit diagram of the power module of the present disclosure;
fig. 6 is a circuit diagram of a communication module according to the present disclosure;
fig. 7 is a circuit diagram of a temperature detection module according to the present disclosure.
Description of reference numerals: the system comprises a control module 1, a photoelectric coupler 2, a digital signal acquisition module 3, a driving module 4, a switch module 5, a power supply module 6, a communication module 7 and a temperature detection module 8.
Detailed Description
As shown in fig. 1-7, a digital signal acquisition and control circuit according to the present disclosure includes:
the control module 1 is used for processing and converting the acquired digital signals and outputting control instructions to the outside;
a photoelectric coupler 2;
digital signal acquisition module 3, digital signal acquisition module 3's input is used for gathering the input digital signal, output and optoelectronic coupler 2's input signal connection, optoelectronic coupler 2's output connection control module 1's input. The digital signal acquisition module 3 acquires an external digital signal and inputs the external digital signal into the input end of the photoelectric coupler 2, the conversion of 'electric signal-optical signal-electric signal' is carried out in the photoelectric coupler 2, and an electric signal with inverted level is output to the control module 1 at the output end of the photoelectric coupler 2.
And the output end of the control module 1 is connected with the input end of the drive module 4, and the control module 1 outputs a corresponding drive signal to the drive module 4 after receiving the electric signal output by the photoelectric coupler 2.
And the output end of the driving module 4 is connected with the input end of the switch module 5, and the driving module 4 is used for driving and controlling the on-off of the switch module 5 according to the output signal of the control module 1, so as to control the external equipment to execute corresponding functional operation.
And the power module 6 is electrically connected with the control module 1 and used for supplying power to the control module 1 so as to supply power to the control module 1 for work.
According to the digital signal acquisition module 3, an externally acquired digital signal is input into the control module 1 through the photoelectric coupler 2, the control module 1 receives the input digital signal and then performs identification conversion, and then the drive module 4 drives the switch module 5 to be switched on and off to control external equipment to execute corresponding functional operation. The photoelectric coupler 2 can realize the signal conversion of 'electricity-light-electricity', can realize the complete electrical isolation of the input end and the output end, can avoid the phenomenon of signal crosstalk between the input signal and the output signal, enables the signal acquisition input and output processes to be stable, and improves the stability of the working process of the digital signal acquisition and control circuit.
Further, in the embodiment, referring to fig. 2 in detail, the control module 1 includes an FM33 series MCU, and the pin wiring diagram of the FM33 series MCU is specifically shown in fig. 2.
Further, IN this embodiment, please refer to fig. 3 IN detail, the digital signal acquisition module 3 includes n acquisition channels, each acquisition channel includes a positive input terminal IN + and a negative input terminal IN-, the positive input terminal and the negative input terminal are respectively connected to two ends of an input diode of the photoelectric coupler 2, taking the 1 st acquisition channel as an example, two ends of the input diode are connected through a resistor R9, the positive input terminal is connected between a resistor R9 and the input diode, and the negative input terminal is connected to an output terminal of the input diode through a resistor R11, so that the acquisition channel can input digital signals to the photoelectric coupler 2. N ≧ 2, that is, the digital signal acquisition module 3 includes at least two acquisition channels to carry out the acquisition of multichannel digital signal simultaneously.
Further, in the embodiment, referring to fig. 4 in detail, the driving module 4 specifically includes a darlington array driving chip ULN2003, and the darlington array driving chip ULN2003 can provide multiple driving signal outputs and has the characteristics of high current gain, high working voltage, wide temperature range, strong load carrying capability, and the like.
Further, in this embodiment, the switch module 5 includes 2n switch devices, a control end of each switch device is in signal connection with one output pin of the darlington array driver chip ULN2003, a plurality of output pins of the darlington array driver chip ULN2003 may be used to output a plurality of driving signals, a control end of each switch device is connected to one output pin of the darlington array driver chip ULN2003, and the darlington array driver chip ULN2003 outputs a driving signal from a specified output pin according to the output signal of the control module 1 to drive the corresponding switch device to be turned on or off. The structure forms a structure with n paths of input and 2n paths of output, and can meet diversified use requirements in the actual use process.
Furthermore, in this embodiment, n is 5, that is, the digital signal acquisition module 3 includes 5 channels of acquisition channels, the switch module 5 includes 10 switches, and the number of darlington array driver chips ULN2003 is 2, so as to provide sufficient drive output interface, this embodiment can realize 5 channels of input, the structure of 10 channels of output, can satisfy diversified user demand in the actual use process, and use the structure of driver module 4 drive switches, can make the on-off control of switches stable, and has the advantages of high current gain and high working voltage at the same time. The switch is a relay which has the advantages of stable on-off control and high reliability.
Further, in this embodiment, the switch module 5 further includes:
the indicating lamps are matched with the switch pieces in number, and each indicating lamp is in signal connection with one output pin of the Darlington array driving chip ULN2003, namely the indicating lamps correspond to the switch pieces one by one and are used for indicating the on-off state of each switch piece, so that an operator can intuitively master the on-off state of each switch piece.
Further, in the present embodiment, please refer to fig. 5 in detail, the power module 6 includes:
a Buck voltage reduction unit;
a voltage stabilization unit; the voltage input end of the Buck voltage reduction unit is used for accessing external voltage, and the voltage output end of the Buck voltage reduction unit is electrically connected with the voltage input end of the voltage stabilization unit; the voltage output end of the voltage stabilizing unit is electrically connected with the voltage input end of the control module 1; buck step-down unit is used for stepping down external 12V voltage to 5V voltage, and linear voltage regulator LDO is specifically chooseed for use to the voltage stabilizing unit, and the voltage stabilizing unit further steps down 5V voltage to 3.3V and gives the MCU power supply. The power supply module 6 can provide a stable power supply voltage.
Further, in this embodiment, referring to fig. 6 in detail, the digital signal acquisition and control circuit further includes:
communication module 7, communication module 7 and control module 1 communication connection for with the external equipment communication, communication module 7 specifically is 485 communication chips, still is equipped with the isolation power supply who independently is the 485 communication chips power supply. The RS485 communication chip has the advantages of high transmission efficiency, strong anti-interference capability and stable transmission.
Further, in this embodiment, referring to fig. 7 in detail, the digital signal acquisition and control circuit further includes:
and the signal output end of the temperature detection module 8 is in signal connection with the signal input end of the control module 1. The temperature detection module 8 includes a temperature sensor DS18B20, which can be used for circuit and ambient temperature detection.
The working process of the digital signal acquisition and control circuit of the present disclosure will be fully explained in the following with the above contents.
The external 12V voltage of power module 6, export 3.3V for the MCU power supply after Buck step-down voltage stabilization through Buck voltage reduction unit and voltage stabilizing unit, 12V voltage is the isolation power supply of communication module 7 after Buck voltage reduction through Buck voltage reduction unit simultaneously, five way digital signal at most are imported into optoelectronic coupler 2's input through digital signal acquisition module 3's 5 way input channel, digital signal produces the signal of a level upset through optoelectronic coupling IN optoelectronic coupler 2, if when IN1 +/-is low, MCU IN1 is often high, when IN1+ detects the height, the opto-coupler switches on, MCU IN1 switches on ground, can produce a falling edge. When IN1+ is high and IN 1-is low, the optocoupler is on, MCU IN1 is always low, and when IN1+ detects low, the optocoupler is off, which generates a rising edge. After receiving the digital signal, the MCU outputs a driving signal through the Darlington array driving chip ULN2003 according to the input digital signal, and controls the on-off of the corresponding relay so as to control the functional operation of the corresponding external equipment.
In the description of the present disclosure, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience in describing and simplifying the present disclosure, and in the absence of a contrary explanation, these directional terms are not intended to indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present disclosure.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present disclosure.
Claims (10)
1. A digital signal acquisition and control circuit, comprising:
a control module;
a photoelectric coupler;
the input end of the digital signal acquisition module is used for acquiring digital signals, and the output end of the digital signal acquisition module is in signal connection with the input end of the photoelectric coupler; the output end of the photoelectric coupler is connected with the input end of the control module;
the output end of the control module is connected with the input end of the driving module;
the output end of the driving module is connected with the input end of the switch module, and the driving module is used for driving the switch module to be switched on and off according to the output signal of the control module;
and the power supply module is electrically connected with the control module and used for supplying power to the control module.
2. The digital signal acquisition and control circuit of claim 1 wherein the control module comprises an FM33 series MCU.
3. The digital signal acquisition and control circuit according to claim 1, wherein the digital signal acquisition module comprises n acquisition channels, each of the acquisition channels comprises a positive input terminal and a negative input terminal, and the positive input terminal and the negative input terminal are respectively connected to two ends of an input diode of the photocoupler; n is ≧ 2.
4. The digital signal acquisition and control circuit of claim 3 wherein said driver module comprises a Darlington array driver chip ULN 2003.
5. The digital signal acquisition and control circuit of claim 4, wherein the switch module comprises 2n switch elements, and a control terminal of each switch element is in signal connection with one output pin of the darlington array driver chip ULN 2003.
6. The digital signal acquisition and control circuit of claim 5, wherein n is 5; the number of the Darlington array driving chips ULN2003 is 2; the switch is a relay.
7. The digital signal acquisition and control circuit of claim 6, wherein the switch module further comprises:
the number of the indicator lamps is matched with that of the switch pieces, and each indicator lamp is in signal connection with one output pin of the Darlington array driving chip ULN2003 and is used for indicating the on-off state of each switch piece.
8. The digital signal acquisition and control circuit of claim 1, wherein the power module comprises:
a Buck voltage reduction unit;
a voltage stabilization unit; the voltage input end of the Buck voltage reduction unit is used for accessing external voltage, and the voltage output end of the Buck voltage reduction unit is electrically connected with the voltage input end of the voltage stabilization unit; and the voltage output end of the voltage stabilizing unit is electrically connected with the voltage input end of the control module.
9. The digital signal acquisition and control circuit of claim 1, further comprising:
and the communication module is in communication connection with the control module and is used for communicating with external equipment.
10. The digital signal acquisition and control circuit of claim 1, further comprising:
and the signal output end of the temperature detection module is in signal connection with the signal input end of the control module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122914200.6U CN216526808U (en) | 2021-11-25 | 2021-11-25 | Digital signal acquisition and control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122914200.6U CN216526808U (en) | 2021-11-25 | 2021-11-25 | Digital signal acquisition and control circuit |
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| Publication Number | Publication Date |
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| CN216526808U true CN216526808U (en) | 2022-05-13 |
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| CN202122914200.6U Active CN216526808U (en) | 2021-11-25 | 2021-11-25 | Digital signal acquisition and control circuit |
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