CN209767563U - device capable of transmitting signals through positive and negative lines of power supply - Google Patents
device capable of transmitting signals through positive and negative lines of power supply Download PDFInfo
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- CN209767563U CN209767563U CN201920717510.9U CN201920717510U CN209767563U CN 209767563 U CN209767563 U CN 209767563U CN 201920717510 U CN201920717510 U CN 201920717510U CN 209767563 U CN209767563 U CN 209767563U
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Abstract
The utility model discloses a can carry out signal transmission's device through power supply positive negative line, the device contains: the device comprises a main circuit, n communication modules, two common signal line positive ends and negative ends, a power supply circuit and a power supply circuit, wherein the two common signal line positive ends and the two common signal line negative ends are used for connecting the output end of the main circuit and the communication modules; the main circuit of the device maintains the high potential of the point B to output power to the communication module by means of the power-on starting circuit and the pull-up resistor R4 when no communication module receives the communication control signal of high level to make the corresponding field effect switch tube conduct, and each communication module can also supply power by means of the energy storage circuit when the point B enters the low potential. Therefore, the main circuit can transmit signals on a common line along with the high and low levels of the control signals of each module, so that the modules can communicate with each other through the sampling signals and the control signals, normal communication among the modules is realized, and meanwhile, the power supply requirement of each module is also met.
Description
Technical Field
The utility model relates to a communication field indicates especially one kind can carry out signal transmission and can provide the device of power for the module again through the positive negative line of power.
background
With the development of networks, particularly the wide application of the internet of things, various communication modules are developed rapidly, however, as the arrangement positions of various communication modules are often far away from a power supply, a power supply line is usually arranged independently, and due to space limitations, excessive lines are not troublesome to overhaul and difficult to overhaul, so that a POE standard power supply system is developed, which adopts five types of standard network lines, has four twisted pairs, but only two of the five types of standard network lines are used in 10M BASE-T and 100M BASE-T. IEEE802.3af allows two usages, when the power supply of idle pin is applied, the connection of pins 4 and 5 is positive, and the connection of pins 7 and 8 is negative. When the data pin is used for supplying power, the DC power supply is added to the midpoint of the transmission transformer, and the transmission of data is not influenced.
however, this method still requires a separate power supply line and a special power supply module, which results in a complicated structure and complicated wiring, and thus it is necessary to provide a simpler and more economical power supply method for the communication module.
SUMMERY OF THE UTILITY MODEL
Therefore, in order to solve the above problems, an object of the present invention is to provide a circuit device that is simple and practical, and can realize transmission of remote signals and power supply integration.
in order to achieve the above object, the present invention provides a device capable of transmitting signals through a positive line and a negative line of a power supply, the device comprising: the device comprises a main circuit, n communication modules, two common signal line positive ends and negative ends, a power supply circuit and a power supply circuit, wherein the two common signal line positive ends and the two common signal line negative ends are used for connecting the output end of the main circuit and the communication modules;
The main circuit is provided with a direct current power supply input end and a main circuit output end, a power supply switch tube Q3 and a current sampling resistor R5 are connected between the direct current power supply input end and the main circuit output end in series, the connection point of the power supply switch tube and the current sampling resistor R5 is set as a point A, the other end of the current sampling resistor R5 is set as a main circuit output positive end point B,
The main circuit comprises a power-on starting circuit, a high-level locking circuit and a low-level locking circuit, wherein the power-on starting circuit enables a power switch tube Q3 to be conducted when the device is powered on, the high-level locking circuit enables a power switch tube Q3 to be kept conducted when the potential of a point B is high, and the low-level locking circuit enables a power switch tube Q3 to be kept cut off when the potential of the point B is low;
Each communication module comprises three ports, namely a first port, a second port and a third port, wherein the first port of the communication module is connected with the positive end of a common signal line, each communication module is provided with a tank circuit, a signal sampling circuit and a communication control signal circuit which are respectively arranged between the first end and the grounding end, the tank circuit can supply power to the communication module 1,
the second port is a signal sampling end and is arranged on the signal sampling circuit and used for collecting the signal of the first port,
The third port is a communication control end, is arranged in the communication control signal circuit and controls the on-off of a communication module switch tube which is connected in series with the first end and the grounding end by means of a control signal;
In addition, a pull-up resistor R4 is connected between the DC power input end and the point B for pulling up the potential of the point B;
The main circuit enables signals to be transmitted on a common line along with the high and low levels of the control signals of each module, and the modules communicate with each other through the sampling signals and the control signals, so that normal communication among the modules is realized.
with the help of the above circuit, the utility model discloses a can carry out signal transmission's device through power supply positive negative line main circuit is in not having any with the help of adding starting circuit and pull-up resistance R4 the communication module receives the communication control signal of high level and makes corresponding field effect switch tube switch on, maintains the high potential of B point to communication module output electric power, and when B point got into the low potential, then each communication module can also be by the energy storage circuit power supply that it had. Therefore, the main circuit can transmit signals on a common line along with the high and low levels of the control signals of each module, so that the modules can communicate with each other through the sampling signals and the control signals, normal communication among the modules is realized, and meanwhile, the power supply requirement of each module is also met.
Preferably, the output terminal of the high-level-locked loop is connected to the gate of the power switch Q3, and the gate of the power switch Q3 is connected to the output terminal of the low-level-locked loop through a diode D2, the connection point is set as point C, the point C is connected to the power-on start circuit through a diode D7, and the power switch is a fet Q3.
Preferably, the power-on start circuit is composed of a resistor R1 and a capacitor C1 connected in series to the positive terminal and the ground terminal of the dc power input, and the connection point of the resistor R1 and the capacitor C1 is connected to the point C through a diode D7.
Preferably, the high-level locking circuit is disposed between the point C and the ground terminal, the high-level locking circuit includes a fet Q4, the fet Q4 is connected in series between the ground terminal of the point C through a resistor R3, the gate of the fet Q4 is connected to the positive input terminal of the dc power supply through a resistor R13 and a transistor Q5, the base of the transistor Q5 is connected to the positive output terminal of the main power supply, a reverse diode is disposed between the base and the emitter of the transistor Q5, and the base of the transistor Q5 is grounded through a resistor R14.
Preferably, the low-level locking circuit mainly includes two transistors Q2, Q6, wherein an emitter and a collector of the transistor Q2 are respectively connected to the dc power supply + input terminal and the gate of the fet Q3, the collector of the transistor Q6 is respectively connected to a base of the transistor Q2 and a positive input terminal of the dc power supply through a resistor R7 and a resistor R6, the emitter of the transistor Q6 is connected to the point B, and the base of the transistor Q6 is respectively connected to the positive input terminal of the dc power supply and the point B through a resistor R8 and a resistor R9.
preferably, the main circuit is provided with a transistor Q1 and a resistor R2 for accelerating the speed of the Q3 from the on to off instant, the collector of the transistor Q1 is connected to the positive input end of the dc power supply, and the emitter is connected to the gate of the field effect transistor Q3. The circuit can improve the steepness of the falling edge of the waveform.
Preferably, the energy storage circuit in each communication module is formed by connecting an energy storage capacitor and an isolation diode in series between the first end and the ground end.
Preferably, the sampling circuit is composed of resistors connected in series, and a connection point of the resistors connected in series is connected to the second port, i.e., the signal sampling end.
Preferably, the communication control signal circuit includes a fet switch disposed between the first port and the ground terminal, the fet switch having a source and a drain respectively connected to the positive output terminal and the ground terminal of the main circuit, and a gate connected to the communication control signal input port.
the utility model discloses a can carry out signal transmission's module power supply unit through positive negative line of power, because the main circuit can make the signal transmit on public online along with the high low level of the control signal of every module, therefore accessible sampling signal between each module, control signal communicates, has realized the normal communication between the module, has also solved the power supply demand of each module simultaneously.
beneficial effect lies in, with the help of above-mentioned technical scheme, the utility model has the following characteristics:
1. The anti-interference capability of the transmission signal is strong, and the transmission distance is long.
2. The power can be supplied to the module unit while the signal is transmitted.
3. The rising edge and the falling edge of the signal waveform are steep, and the transmission speed is high.
Because the circuit is simple and practical, a better solution is provided for the transmission and power supply of remote signals.
Drawings
Fig. 1 is a schematic diagram of the circuit structure of the present invention.
Wherein: r10, R17 and R11 are communication module voltage dividing resistors, R15, R16 and R18 are control end resistors, Q7 and Q8 are communication module field effect switching tubes, D4 and D5 are communication module isolation diodes, and C2 and C3 are communication module charging capacitors.
Detailed Description
the technical solution of the present invention is further described in detail by the following embodiments with reference to the accompanying drawings.
The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
As shown in fig. 1, the embodiment of the present invention includes a main circuit and n communication modules, wherein the output end of the main circuit supplies power to the communication modules connected in parallel by means of two common signal lines "+" and "-".
The main circuit comprises a P-type field effect transistor Q3, wherein the source electrode of the P-type field effect transistor Q3 is connected with the + input end of a direct current power supply, the drain electrode of the P-type field effect transistor Q3 is connected with a current sampling resistor R5, the connection end of the current sampling resistor R5 and the drain electrode is set as a point A, and the other end (set as a point B) of the current sampling resistor R5 is used as the output + end of the main circuit and is connected with the + end of a common.
The gate of the effect transistor Q3 is connected to the anode of a diode D2, the cathode of the diode D2 is connected to the ground via a point C, a diode D7 and a capacitor C1 are connected in series, and the connection point of the series-connected diode D7 and capacitor C1 is connected to the dc power input + terminal via a resistor R1 and a backward diode D1, respectively.
A high level locking circuit is arranged between a point C and a ground terminal, the high level locking circuit comprises a field effect transistor Q4, the field effect transistor Q4 is connected in series between the ground terminals of the point C through a resistor R3, the grid electrode of the field effect transistor Q4 is connected with a direct current power supply input + terminal (point B) through a resistor R13 and a triode Q5, the base electrode of the triode Q5 is connected with a main power supply output + terminal, a reverse diode is arranged between the base electrode and the emitter electrode of the triode Q5, and the base electrode of the triode Q5 is grounded through a resistor R14.
In addition, the gate of the field effect transistor Q3 is also connected with a low level locking circuit, which mainly comprises two triodes Q2 and Q6, wherein the emitter and the collector of the triode Q2 are respectively connected with the dc power supply + input terminal and the gate of the field effect transistor Q3, the collector of the triode Q6 is respectively connected with the base of the triode Q2 and the dc power supply + input terminal through a resistor R7 and a resistor R6, the emitter of the triode Q6 is connected with a point B (main circuit output + terminal), and the base of the triode Q6 is respectively connected with the dc power supply + input terminal and the point B through a resistor R8 and a resistor R9 (i.e. across the two ends of the sampling resistor R5).
in addition, a transistor Q1 and a resistor R2 for accelerating the speed of the Q3 at the moment of turning on and off are provided in the main circuit to increase the waveform falling edge steepness.
As shown in fig. 1, each of the communication modules includes three ports, taking the communication module 1 as an example: the first port of the communication module is provided with an isolation diode D4(D5) and a capacitor C2(C3) which are connected in series with the grounding end; the second port is a signal sampling end, which is located at the midpoint of the sampling circuit between the first end and the ground end (in this embodiment, the sampling circuit is composed of resistors connected in series); and the third end is a communication control end, and the first port of the communication module is connected with the output + end of the main circuit through the common signal + end.
The energy storage circuit is composed of an isolation diode D4 and a capacitor C2, and the electric quantity stored by the capacitor C2 can directly supply power to the module;
The two signal sampling circuits are composed of resistors R10 and R17, and the connection points of the two resistors are connected with a signal sampling end;
The communication control signal circuit comprises a field effect transistor Q7 arranged between a first port and a grounding end, wherein a source electrode and a drain electrode of the field effect transistor Q7 are respectively connected with an output + end and the grounding end of a main circuit, and a grid electrode is connected with a communication control signal input port (communication control signal 1).
The utility model discloses a can carry out signal transmission's device through power supply positive negative line, the principle of its during operation is:
After the power supply is switched on, a 12V power supply connected to the + input end of the direct current power supply charges a capacitor C1 through a resistor R1, the voltage at two ends of a C1 cannot suddenly change, the potential at the point C is instantaneously zero, the grid potential of a tube of a P-type field effect tube Q3 becomes low potential, Q3 is conducted, the potential at the point A of a drain electrode of Q3 is increased to be power supply voltage, power is supplied to each module through a current sampling resistor R5, the potential at the point B is high potential, the triode Q5 is conducted, the field effect tube Q4 is conducted, the potential at the point C is pulled low, the potential at the point B is ensured to be high potential, an output signal is high level, and power can be supplied to the communication module through a plus line and a common signal line < -.
Since the circuits and the operating principles of the n communication modules are the same, the operating principle of each communication module will be described by taking the communication module 1 as an example.
As shown in fig. 1, each communication module in the figure has three ports, for example, in the module 1, the first one charges the capacitor C2 through the isolation diode D4, the charging voltage is close to the power supply voltage 12V, and the voltage on the capacitor C2 can directly supply the module 1; the second is a signal sampling circuit consisting of R10 and R17; the third is a communication control signal input port composed of Q7, R15 and R16. And the other communication modules and the like.
For example, at a certain time, the control signal of the module 1 is high level, the fet Q7 is turned on, and the potential at the B point of the main circuit is pulled to zero by the Q7. The output signal is changed into low potential, because the potential at the point B is changed into zero potential, the voltage drop at two ends of the current sampling resistor R5 is increased, when the voltage at two ends exceeds 0.7V, the triode Q6 is conducted, the triode Q2 is conducted, so that the grid potential of the field effect tube Q3 is quickly increased to the power supply voltage, the Q3 is changed from conduction to cut-off, meanwhile, because the potential at the point B is changed into zero, the triode Q5 is changed from conduction to cut-off, the Q4 is also changed from conduction to cut-off, and therefore the potential at the point C is relieved. Q3 is locked in the off state by feedback. The output potential difference at both ends of the common communication line is 0V at this time.
At the next moment, the control signal of the module 1 is changed into low level, the field effect transistor Q7 is turned off, the impedance at two ends of a rear-stage output signal line becomes high (only a signal sampling resistor), the P-channel field effect transistor Q3 is in a closed state at the moment, 12V voltage provides current for a point B through the resistor R4, the voltage at the point B is gradually increased, the current charges the grid of the field effect transistor Q4 through the triode Q5, when the voltage is higher than the starting voltage of the field effect transistor Q4, the Q4 is conducted to pull down the voltage at the point C and charge the grid of the P-channel field effect transistor Q3, so that the Q3 is conducted, the voltage at the point B at the point A is further increased until the voltage is close to 12V power supply voltage, and the potential difference.
the triodes Q1 and R2 in the main circuit are used for accelerating the speed of the Q3 from the on to the off moment and improving the steepness of the falling edge of the waveform.
Therefore, the main circuit can transmit signals on a common line along with the high and low levels of the control signals of each module, so that the modules can communicate with each other through the sampling signals and the control signals, normal communication among the modules is realized, and meanwhile, the power supply requirement of each module is also met. Because the circuit is simple and practical, a good solution is provided for the transmission and power supply of remote signals.
Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can be modified or replaced with other embodiments without departing from the spirit and scope of the present invention, and all such modifications and equivalent substitutions are intended to be encompassed by the scope of the following claims.
Claims (9)
1. an apparatus for enabling signal transmission via positive and negative lines of a power supply, the apparatus comprising: the device comprises a main circuit, n communication modules, two common signal line positive ends and negative ends, a power supply circuit and a power supply circuit, wherein the two common signal line positive ends and the two common signal line negative ends are used for connecting the output end of the main circuit and the communication modules;
The main circuit is provided with a direct current power supply input end and a main circuit output end, a power supply switch tube Q3 and a current sampling resistor R5 are connected between the direct current power supply input end and the main circuit output end in series, the connection point of the power supply switch tube and the current sampling resistor R5 is set as a point A, the other end of the current sampling resistor R5 is set as a main circuit output positive end point B,
the main circuit comprises a power-on starting circuit, a high-level locking circuit and a low-level locking circuit, wherein the power-on starting circuit enables a power switch tube Q3 to be conducted when the device is powered on, the high-level locking circuit enables a power switch tube Q3 to be kept conducted when the potential of a point B is high, and the low-level locking circuit enables a power switch tube Q3 to be kept cut off when the potential of the point B is low;
each communication module comprises three ports, namely a first port, a second port and a third port, wherein the first port of the communication module is connected with the positive end of a common signal line, each communication module is provided with a tank circuit, a signal sampling circuit and a communication control signal circuit which are respectively arranged between the first end and the grounding end, the tank circuit can supply power to the communication module 1,
The second port is a signal sampling end and is arranged on the signal sampling circuit and used for collecting the signal of the first port,
The third port is a communication control end, is arranged in the communication control signal circuit and controls the on-off of a communication module switch tube which is connected in series with the first end and the grounding end by means of a control signal;
In addition, a pull-up resistor R4 is connected between the DC power input end and the point B for pulling up the potential of the point B;
The main circuit enables signals to be transmitted on a common line along with the high and low levels of the control signals of each module, and the modules communicate with each other through the sampling signals and the control signals, so that normal communication among the modules is realized.
2. The apparatus of claim 1, wherein the output terminal of the high-level-locking circuit is connected to the gate of the power switch Q3, and the gate of the power switch Q3 is connected to the output terminal of the low-level-locking circuit through a diode D2, the connection point is set as point C, the point C is connected to the power-on start circuit through a diode D7, and the power switch is a fet Q3.
3. The apparatus of claim 2, wherein the power-on start circuit comprises a resistor R1 and a capacitor C1 connected in series between the positive terminal and the ground terminal of the dc power input, and the connection point of the resistor R1 and the capacitor C1 is connected to the point C through a diode D7.
4. The apparatus of claim 2, wherein the apparatus is capable of transmitting signals via positive and negative lines of a power supply, further comprising: the high-level locking circuit is arranged between a point C and a ground terminal, the high-level locking circuit comprises a field effect transistor Q4, the field effect transistor Q4 is connected in series between the ground terminal of the point C through a resistor R3, the grid electrode of the field effect transistor Q4 is connected with the positive input end of a direct-current power supply through a resistor R13 and a triode Q5, the base electrode of the triode Q5 is connected with the positive output end of a main power supply, a backward diode is arranged between the base electrode and the emitting electrode of the triode Q5, and the base electrode of the triode Q5 is grounded through a resistor R14.
5. The apparatus of claim 2, wherein the apparatus is capable of transmitting signals via positive and negative lines of a power supply, further comprising: the low-level locking circuit mainly comprises two triodes Q2 and Q6, wherein an emitter electrode and a collector electrode of the triode Q2 are respectively connected to a direct-current power supply + input end and a grid electrode of a field-effect tube Q3, the collector electrode of the triode Q6 is respectively connected with a base electrode of the triode Q2 and a positive input end of the direct-current power supply through a resistor R7 and a resistor R6, the emitter electrode of the triode Q6 is connected with a point B, and the base electrode of the triode Q6 is respectively connected with the positive input end of the direct-current power supply and the point B through the resistor R8 and a resistor R9.
6. the apparatus of claim 2, wherein the apparatus is capable of transmitting signals via positive and negative lines of a power supply, further comprising: the main circuit is provided with a transistor Q1 and a resistor R2 for accelerating the speed of the Q3 from the moment of turning on to the moment of turning off, wherein the collector of the transistor Q1 is connected with the positive input end of a direct current power supply, and the emitter of the transistor Q1 is connected with the grid of a field effect transistor Q3.
7. The apparatus of claim 2, wherein the apparatus is capable of transmitting signals via positive and negative lines of a power supply, further comprising: the energy storage circuit in each communication module is formed by connecting an energy storage capacitor and an isolation diode between a first end and a grounding end in series.
8. The apparatus of claim 2, wherein the apparatus is capable of transmitting signals via positive and negative lines of a power supply, further comprising: the sampling circuit is composed of resistors connected in series, and the connection point of the resistors connected in series is connected with a second port, namely a signal sampling end.
9. the apparatus of claim 2, wherein the apparatus is capable of transmitting signals via positive and negative lines of a power supply, further comprising: the communication control signal circuit comprises a field effect transistor switch tube arranged between a first port and a grounding end, a source electrode and a drain electrode of the field effect transistor switch tube are respectively connected with an output positive end and the grounding end of the main circuit, and a grid electrode of the field effect transistor switch tube is connected with a communication control signal input port.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920717510.9U CN209767563U (en) | 2019-05-17 | 2019-05-17 | device capable of transmitting signals through positive and negative lines of power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920717510.9U CN209767563U (en) | 2019-05-17 | 2019-05-17 | device capable of transmitting signals through positive and negative lines of power supply |
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| CN209767563U true CN209767563U (en) | 2019-12-10 |
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| CN201920717510.9U Active CN209767563U (en) | 2019-05-17 | 2019-05-17 | device capable of transmitting signals through positive and negative lines of power supply |
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