CN211352194U - Nonpolar power supply circuit with digital signal modulation - Google Patents
Nonpolar power supply circuit with digital signal modulation Download PDFInfo
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- CN211352194U CN211352194U CN202020404374.0U CN202020404374U CN211352194U CN 211352194 U CN211352194 U CN 211352194U CN 202020404374 U CN202020404374 U CN 202020404374U CN 211352194 U CN211352194 U CN 211352194U
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Abstract
The utility model discloses a take nonpolar power supply circuit of digital signal modulation. The first transmitting circuit and the first receiving circuit are respectively connected with a slave power supply circuit, and the slave power supply circuit is respectively connected with the second transmitting circuit, the second receiving circuit and the voltage reduction circuit through two wires. The utility model provides high digital signal sensor device or distal end signal acquisition module and main control unit's wiring reliability problem, the quantity with many connecting wires of traditional power cord + signal line is reduced to minimumly, as long as two wires can realize, two wires do not divide positive negative polarity when connecting, realize totally that this type of sensor or data acquisition module is zero mistake when using the wiring, communication signal electric current is great, the interference killing feature is strong, communication distance increases, signal transmission is reliable and stable.
Description
Technical Field
The utility model belongs to the technical field of industrial automation, concretely relates to take nonpolarity power supply circuit of digital signal modulation.
Background
In the industrial automation and instrument industry, a plurality of sensors and signal acquisition modules with low power consumption are provided. They require on the one hand a main control unit to provide a weak current supply (5V or 3.3V); and on the other hand, the collected signals are transmitted to the main control unit through digital communication. Therefore, at least 3 wires are needed when the main control unit is connected, the wires have a fixed sequence, the main control unit is far away from a far-end sensor or a signal acquisition module in actual use, the condition of wrong wire connection cannot be avoided during wiring connection, signal transmission is not good, and even the situation that a power supply is connected and a chip is burnt out is caused.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem: the non-polar power supply circuit with digital signal modulation is provided, the power supply of a remote module can be realized only by two leads without positive and negative polarities, and digital communication signals are modulated onto a power line, so that the problems of wrong wiring and reverse wiring of related products in an industrial control field are fundamentally solved.
The technical scheme is as follows: in order to solve the technical problem, the utility model discloses a technical scheme as follows:
a nonpolar power supply circuit with digital signal modulation comprises a first sending circuit and a first receiving circuit which are arranged in a host machine, and a second sending circuit, a second receiving circuit and a voltage reduction circuit which are arranged in a slave machine, wherein the first sending circuit and the first receiving circuit are respectively connected with a slave machine power supply circuit, and the slave machine power supply circuit is respectively connected with the second sending circuit, the second receiving circuit and the voltage reduction circuit through two leads.
Further, a bridge rectifier circuit is connected between the slave power supply circuit and the second transmitting circuit, between the second receiving circuit and the voltage reduction circuit, and the bridge rectifier circuit is arranged in the slave.
Furthermore, the slave power supply circuit comprises a resistor R1 with one end connected with the positive pole of the power supply, the other end of the resistor R1 is connected with one wire, and the other wire is grounded.
Further, the first sending circuit comprises a resistor R2 with one end connected with the host controller, the other end of the resistor R2 is connected with the base of a triode Q1, the collector of the triode Q1 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the other end of a resistor R1, and the emitter of the triode Q1 is grounded.
Further, the first receiving circuit comprises a voltage regulator tube Z1 of which the negative end is connected with the other end of the resistor R1, the positive end of the voltage regulator tube Z1 is connected with one end of the resistor R4 and one end of the resistor R5 respectively, the other ends of the resistor R4 and the resistor R5 are connected with the emitter and the base of the triode Q2 respectively, the emitter of the triode Q2 is grounded, the collector of the triode Q2 is connected with one end of the resistor R6 and one end of the resistor R7 respectively, and the other ends of the resistor R6 and the resistor R7 are connected with the positive electrode of the power supply and the host controller respectively.
Furthermore, the second transmitting circuit comprises a resistor R11 with one end connected with the slave controller, the other end of the resistor R11 is connected with the base electrode of the triode Q11, the emitter electrode of the triode Q11 is grounded, the collector electrode of the triode Q11 is connected with one end of the resistor R12, and the other end of the resistor R12 is connected with the positive output end of the bridge rectifier circuit.
Further, the second receiving circuit comprises a voltage regulator tube Z11 with a negative end connected with a positive output end of the bridge rectifier circuit, a positive end of the voltage regulator tube Z11 is connected with one end of a resistor R13 and one end of a resistor R14 respectively, the other ends of the resistor R13 and the resistor R14 are connected with an emitter and a base of a triode Q12 respectively, the emitter of the triode Q12 is grounded, a collector of the triode Q12 is connected with one end of a resistor R15 and one end of a resistor R16 respectively, and the other ends of the resistor R15 and the resistor R15 are connected with the positive output end of the step-down circuit and the slave controller respectively.
Furthermore, the voltage reduction circuit comprises a voltage reduction chip U11 connected with the output end of the bridge rectifier circuit, and the input end and the output end of the voltage reduction chip U11 are respectively connected with a capacitor in parallel.
Further, the positive electrode output end of the bridge rectifier circuit is connected with the positive electrode of the diode D13, and the negative electrode of the diode D13 is connected with the positive electrode input end of the voltage reduction chip U11.
Further, the slave machine comprises a remote sensor and a signal collector.
Has the advantages that: compared with the prior art, the utility model has the advantages of it is following:
1. the utility model discloses thoroughly solve some power consumptive lower digital signal sensor device or distal end signal acquisition module and main control unit's wiring reliability problem, fall to traditional power cord + many connecting wires of signal line quantity to minimumly, as long as two wires can realize, two wires of the most important do not divide positive negative polarity when connecting, realize the zero error of this type of sensor or data acquisition module when using the wiring completely.
2. The communication signal is modulated to the power line, the power consumption is self-provided, the current of the communication signal is large, the anti-interference capability is strong, the communication distance is increased, and the signal transmission is stable and reliable.
Drawings
Fig. 1 is a schematic diagram of a non-polar power supply circuit with digital signal modulation.
Detailed Description
The present invention will be further clarified by the following embodiments, which are implemented on the premise of the technical solution of the present invention, and it should be understood that these embodiments are only used for explaining the present invention and are not used for limiting the scope of the present invention.
As shown in fig. 1, the non-polar power supply circuit with digital signal modulation of the present application includes a first transmitting circuit and a first receiving circuit disposed in a host, and a second transmitting circuit, a second receiving circuit and a voltage dropping circuit disposed in a slave. The first transmitting circuit and the first receiving circuit are respectively connected with the slave power supply circuit, and the slave power supply circuit is respectively connected with the second transmitting circuit, the second receiving circuit and the voltage reduction circuit through two wires. Furthermore, the master supplies power to the slave through the two wires, and also performs digital communication with the slave through the two wires. The slave machines include, but are not limited to, remote sensors and signal collectors.
In order to prevent the abnormal condition that the two wires are reversely connected, a bridge rectifier circuit is further connected between the slave power supply circuit and the second transmitting circuit, between the second receiving circuit and between the slave power supply circuit and the voltage reduction circuit, and the bridge rectifier circuit is arranged in the slave. The bridge rectifier circuit can be composed of two half-bridge modules D11 and D12, and can work normally no matter how the host computer is connected with the slave computer through two wires.
The utility model discloses from the anodal resistance R1 of being connected of machine power supply circuit includes one end and power supply, and resistance R1's the other end is connected with one of them wire, another wire ground connection.
The utility model discloses first sending circuit includes resistance R2 that one end and host controller are connected, and resistance R2's the other end is connected with triode Q1's base, and triode Q1's collecting electrode is connected with resistance R3's one end, and resistance R3's the other end is connected with resistance R1's the other end, triode Q1's projecting pole ground connection.
The utility model discloses a first receiving circuit includes stabilivolt Z1 that negative pole end and resistance R1's the other end are connected, stabilivolt Z1's positive terminal is connected respectively with resistance R4 and resistance R5's one end, resistance R4 and resistance R5's the other end is connected respectively with triode Q2's projecting pole and base, triode Q2's projecting pole ground connection, and its collecting electrode is connected respectively with resistance R6 and resistance R7's one end, resistance R6 and resistance R7's the other end and power are anodal to be connected respectively with the host controller and are connected.
The utility model discloses second transmitting circuit includes one end and the resistance R11 of being connected from the machine control ware, and resistance R11's the other end is connected with triode Q11's base, and triode Q11's projecting pole ground connection, and its collecting electrode is connected with resistance R12's one end, and resistance R12's the other end is connected with bridge rectifier circuit's positive output.
The utility model discloses the second receiving circuit includes the stabilivolt Z11 that negative pole end and bridge rectifier circuit's positive output end are connected, stabilivolt Z11's positive terminal is connected respectively with resistance R13 and resistance R14's one end, resistance R13 and resistance R14's the other end is connected respectively with triode Q12's projecting pole and base, triode Q12's projecting pole ground connection, and its collecting electrode is connected respectively with resistance R15 and resistance R16's one end, resistance R15 and resistance R15's the other end and step-down circuit's positive output end and slave controller are connected respectively.
The utility model discloses step-down circuit includes the step-down chip U11 of being connected with bridge rectifier circuit's output, and step-down chip U11's input and output are parallelly connected respectively has electric capacity. The capacitor connected in parallel with the input end of the voltage reduction chip U11 preferably comprises an electrolyte capacitor E11 and a capacitor C11, and the capacitor connected in parallel with the output end of the voltage reduction chip U11 preferably comprises an electrolyte capacitor E12 and a capacitor C12. The preferred model of the buck chip U11 is 78L05, and the buck chip U11 converts the power supply voltage provided by the host computer into 5V working voltage to supply power to the slave computer.
The positive output end of the bridge rectifier circuit can be connected with the positive electrode of the diode D13, and the negative electrode of the diode D13 is connected with the positive input end of the voltage reduction chip U11. The diode D13 prevents the reverse voltage from being applied to the buck chip U11.
The utility model discloses a theory of operation does: the slave machine obtains the required direct current power supply input from a lead by using rectifier bridges (D11 and D12) and a diode D13, and supplies power as an internal chip after voltage stabilization; therefore, when the power supplies A and B are connected, the positive polarity and the negative polarity have no influence.
Since the slave module has fixed power consumption (the power consumption value can be actively adjusted by changing the resistor R1), taking the voltage as 24V, the resistance value of the resistor R1 as 330 Ω, and the operating current as 20mA as an example, the resistor R1 forms a 6.6V voltage drop on the master, and the voltage between the power supply wires AB is actually 24-6.6-17.4V.
When the master sends a communication signal to the slave and the master sends a high level to the M _ TXD, the triode Q1 is conducted to connect the resistor R3, and the voltage between the AB leads is reduced to be lower than 12V, so that the voltage at the point (considering rectification and diode voltage drop) on the slave side is smaller than 11V (considering that the voltage at the point (the) is about 1V lower than the voltage at the point (the) of the rectifier and the diode voltage drop) and is lower than the breakdown voltage of the voltage regulator tube Z11, the base electrode of the triode Q12 is a low level, the triode Q12 is cut off, and the high level is obtained from the receiving. When the master machine sends a low level to the M _ TXD, the voltage between the AB leads is recovered to 17.4V, the voltage regulator tube Z11 works, the triode Q12 is conducted, and the slave machine receiving port S _ RXD also receives a low level.
When the slave sends a communication signal to the host and the slave sends a high level to the S _ TXD, the triode Q11 is conducted to connect the resistor R12, the voltage between the AB conductors is reduced to be below 12V, then the voltage at the point I on the host side is insufficient to enable the voltage regulator tube Z1 to work, the triode Q2 is cut off, and the host receiving port M _ RXD obtains a high level. When the slave S _ TXD sends low level, the voltage between the AB leads is recovered to 17.4V, the voltage regulator tube Z1 works, the triode Q1 is conducted, and the host receiving port M _ RXD also receives low level.
It should be noted that the transistor Q1, the transistor Q2, the transistor Q11, and the transistor Q12 may be replaced by other switching devices. The resistances of the resistor R1, the resistor R3 and the resistor R12 can be adjusted correspondingly according to the parameters of the voltage regulator tube Z1 and the voltage regulator tube Z2, the input power voltage and the like.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A nonpolar power supply circuit with digital signal modulation is characterized in that: the first transmitting circuit and the first receiving circuit are respectively connected with a slave power supply circuit, and the slave power supply circuit is respectively connected with the second transmitting circuit, the second receiving circuit and the voltage reduction circuit through two wires.
2. The non-polar power supply circuit with digital signal modulation of claim 1, wherein: bridge rectifier circuits are connected among the slave power supply circuit, the second sending circuit, the second receiving circuit and the voltage reduction circuit, and the bridge rectifier circuits are arranged in the slave.
3. The non-polar power supply circuit with digital signal modulation of claim 2, wherein: the power supply circuit of the slave machine comprises a resistor R1, one end of the resistor R1 is connected with the anode of a power supply, the other end of the resistor R1 is connected with one wire, and the other wire is grounded.
4. The non-polar power supply circuit with digital signal modulation of claim 3, wherein: the first sending circuit comprises a resistor R2 with one end connected with the host controller, the other end of the resistor R2 is connected with the base electrode of a triode Q1, the collector electrode of the triode Q1 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the other end of a resistor R1, and the emitting electrode of the triode Q1 is grounded.
5. The non-polar power supply circuit with digital signal modulation of claim 3, wherein: the first receiving circuit comprises a voltage-regulator tube Z1, the negative end of the voltage-regulator tube Z1 is connected with the other end of a resistor R1, the positive end of the voltage-regulator tube Z1 is connected with one end of a resistor R4 and one end of a resistor R5 respectively, the other ends of the resistor R4 and the resistor R5 are connected with the emitter and the base of a triode Q2 respectively, the emitter of the triode Q2 is grounded, the collector of the triode Q2 is connected with one end of a resistor R6 and one end of a resistor R7 respectively, and the other ends of the resistor R6 and the resistor R7 are connected with the positive electrode of a power supply and a host controller.
6. The non-polar power supply circuit with digital signal modulation of claim 2, wherein: the second sending circuit comprises a resistor R11 with one end connected with the slave controller, the other end of the resistor R11 is connected with the base electrode of a triode Q11, the emitting electrode of the triode Q11 is grounded, the collector electrode of the triode Q11 is connected with one end of a resistor R12, and the other end of the resistor R12 is connected with the positive electrode output end of the bridge rectification circuit.
7. The non-polar power supply circuit with digital signal modulation of claim 2, wherein: the second receiving circuit comprises a voltage-stabilizing tube Z11 with a negative end connected with a positive output end of the bridge rectifier circuit, the positive end of the voltage-stabilizing tube Z11 is respectively connected with one end of a resistor R13 and one end of a resistor R14, the other ends of the resistor R13 and the resistor R14 are respectively connected with an emitter and a base of a triode Q12, the emitter of the triode Q12 is grounded, a collector of the triode Q12 is respectively connected with one end of a resistor R15 and one end of a resistor R16, and the other ends of the resistor R15 and the resistor R15 are respectively connected with the positive output end of the step-down circuit and the slave controller.
8. The non-polar power supply circuit with digital signal modulation of claim 2, wherein: the voltage reduction circuit comprises a voltage reduction chip U11 connected with the output end of the bridge rectifier circuit, and the input end and the output end of the voltage reduction chip U11 are respectively connected with a capacitor in parallel.
9. The non-polar power supply circuit with digital signal modulation of claim 8, wherein: the positive electrode output end of the bridge rectifier circuit is connected with the positive electrode of a diode D13, and the negative electrode of the diode D13 is connected with the positive electrode input end of a voltage reduction chip U11.
10. The non-polar power supply circuit with digital signal modulation of claim 1, wherein: the slave machine comprises a remote sensor and a signal collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020404374.0U CN211352194U (en) | 2020-03-25 | 2020-03-25 | Nonpolar power supply circuit with digital signal modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020404374.0U CN211352194U (en) | 2020-03-25 | 2020-03-25 | Nonpolar power supply circuit with digital signal modulation |
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| Publication Number | Publication Date |
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| CN211352194U true CN211352194U (en) | 2020-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020404374.0U Active CN211352194U (en) | 2020-03-25 | 2020-03-25 | Nonpolar power supply circuit with digital signal modulation |
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| CN (1) | CN211352194U (en) |
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- 2020-03-25 CN CN202020404374.0U patent/CN211352194U/en active Active
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