CN107196770A - The system being powered by signal wire - Google Patents
The system being powered by signal wire Download PDFInfo
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- CN107196770A CN107196770A CN201710630537.XA CN201710630537A CN107196770A CN 107196770 A CN107196770 A CN 107196770A CN 201710630537 A CN201710630537 A CN 201710630537A CN 107196770 A CN107196770 A CN 107196770A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/10—Current supply arrangements
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- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The present invention provides a kind of system being powered by signal wire, it include master unit, at least one from unit, master unit from property-line GND between unit and signal of communication line SP with being each connected.Master unit includes power supply module, Power Monitoring Unit and principal communication module.Power Monitoring Unit monitoring power supply module exports current value, the magnitude of voltage of signal of communication line, and by current value, voltage value data feedback of the information to power supply module.It is each at least to include one-way conduction module from unit and from communication module；Principal communication module and from being connected between communication module by signal of communication line；The output end of power supply module is connected to signal of communication line, and one-way conduction module one end is connected to signal of communication line, one-way conduction module other end ground wire；According to the presence or absence of signal of communication line, power supply module is fed back to being powered from unit according to the signal of energy supply control module.
Description
Technical field
The present invention relates to the communications field, more particularly to a kind of system being powered by signal wire.
Background technology
The main implementation method that equipment or device interior part are powered by its external order wire mainly has at present
Below some.
A kind of method is the current communication interface of transformation, increases new circuit on standard interface, so as to realize externally
Power supply supply.Such as, by increasing rectification circuit, input filter, voltage-regulation and defeated outside standard RS485 bus systems
Go out filter circuit, realize the power supply to terminal node by RS485 2 order wires.
Another method and system powered by Ethernet to external equipment, increase power supply unit, port device detection
Unit and mode switch element, make power line using Ethernet idle line or signal wire and are powered to external equipment.This mode
Shortcoming is between the equipment of transmission information and the equipment of receive information that signal wire is more, and receiving side and sending side need to increase multiple
Miscellaneous circuit unit.
Also a kind of transformation existing power supply method of supplying, by changing the voltage on power line, different voltages represent difference
Code, so as to realize the communication in equipment room or equipment between different parts.Such a method is common, and have can only one-way communication
Defect, or to take the more input/output port of host computer side；Or programming is complicated, it is desirable to which output end must be used
One input/output port does analog sampling and used, for monitoring the voltage on order wire, and proximity device work is reduced in voltage
Increase power supply supply during lower limit；The receiving terminal of receiving device needs to differentiate different voltages to judge the information of communication simultaneously.
The content of the invention
It is few that the purpose of the technical program embodiment is to provide a kind of input/output port for taking equipment, simple structure
The system being powered by signal wire.
The present invention provides a kind of system being powered by signal wire, including master unit and at least one from unit；Institute
State master unit to be connected by signal of communication line from unit with described, the master unit at least includes power supply module, Power Supply Monitoring mould
Block and principal communication module, any one at least includes one-way conduction module from unit and from communication module；The power supply module
Input power is accessed, the control end of the power supply module and the output end of Power Monitoring Unit are connected, the signal of communication line
One end connects the output end of the power supply module, the input/output port of the principal communication module, the other end with it is described from communication
One end connection of the input/output port of module and the one-way conduction module, the input of the Power Monitoring Unit and institute
State output end and the signal of communication line connection of connection power supply module；The power supply module is carried out to the input power of access
Conversion processing, and the out-put supply after conversion is exported by signal of communication line；The Power Monitoring Unit monitors the power supply
Current value that module is exported by the signal of communication line, magnitude of voltage, and according to the current value, magnitude of voltage by output end to
The power supply module sends control signal, and the power supply module is carried out according to the control signal to the out-put supply after conversion processing
Control；The principal communication module and described the communication information is received and sent by the signal of communication line from communication module.
Further, when master unit is between unit without communicating, the principal communication module and described from communication module
Input/output port be input pattern, the power supply module by signal of communication line and one-way conduction module to it is described from
Unit is powered.
Further, when master unit and between unit, have communication each other from unit when, communicate initiate master unit
Or from the input/output port of the communication module of unit be output mode, receive the master unit of signal of communication or from unit
The input/output port of communication module is input pattern；When transmitting low level on signal of communication line, the Power Monitoring Unit
Monitor that the electric current of out-put supply is reached after limit value, control signal is sent to the power supply module, the power supply module is received
Out-put supply or limitation output current are closed after to the control signal；When transmitting high level on signal of communication line, the electricity
Source monitoring module is monitored after the current value of the power supply module output, magnitude of voltage, and control signal is sent to the power supply module,
The power supply module recovers normal power supply pattern according to the control signal, is powered by the signal of communication line.
Further, the principal communication module is identical with the traffic rate from communication module.
Further, the Power Monitoring Unit includes current sample amplifying circuit, the current sample amplifying circuit bag
Include sampling resistor, first resistor, second resistance, 3rd resistor, the 4th resistance, the first amplifier；One end of the sampling resistor,
One end of the first resistor is connected to the output end of the power supply module, the other end of the sampling resistor, second electricity
One end of resistance is connected to the signal of communication line；The normal phase input end of first amplifier is another with the first resistor
End, one end of the 3rd resistor and connection, the other end ground connection of the 3rd resistor；The anti-phase input of first amplifier
End is connected with the other end of the second resistance with one end of the 4th resistance；4th resistor coupled in parallel is in first amplifier
Output end and inverting input between.
Further, the Power Monitoring Unit also includes comparison control circuit, including first comparator, the second comparator
It is connected with an input with gate circuit, the first comparator with the output end of first amplifier, another input
Terminate into the corresponding voltage of default current limit value, an input of second comparator accesses the signal of communication line
On voltage, another input access predeterminated voltage, it is described to be compared respectively with described first with two inputs of gate circuit
The output end of device, the connection of the output end of second comparator, the output end and the control of the power supply module with gate circuit
End connection processed, exports the control signal.
Further, the power supply module includes being connected with each other voltage-stablizer and relay, the input termination of the voltage-stablizer
Enter input power, the output end connection of the input and voltage-stablizer of the relay, control end access the control signal, described
The output end of relay is the output end of the power supply module, and the relay is according to control signal control output to communication
The presence or absence of power supply on signal wire.
Further, the one-way conduction module includes diode, and the signal of communication line is inputted to the height electricity from unit
Ordinary telegram pressure is less than or equal to the maximum voltage value for allowing to input from unit port.
Further, the one-way conduction module includes the 5th resistance, the 6th resistance, the 7th resistance, PMOS and three
Pole pipe, the D poles of the PMOS, one end of the 5th resistance connect the signal of communication line, the 5th resistance it is another
The base stage at end, one end of the 6th resistance and triode is connected, the other end of the 6th resistance, the transmitting of the triode
Pole is grounded；The G poles of the PMOS, the colelctor electrode of the triode are connected with one end of the 7th resistance, the S of the PMOS
Pole, the other end of the 7th resistance are connected, and are used as the output end of the one-way conduction module.
Further, described also to include energy-storage module from unit, one end of the energy-storage module, which is connected to, described unidirectionally leads
The output end of logical module, the other end ground connection of the energy-storage module, when the voltage on the signal of communication line is that low-voltage can not
During to be powered from unit, the energy-storage units supply electricity to described from unit.
The technical program also provides a kind of method being powered by signal wire, for master unit and at least one from list
Power supply between member, it includes step：Input power is handled to the work electricity being converted into from needed for unit by the master unit
Pressure；
When master unit is between unit without communicating, powered by signal of communication line to described from unit；According to the communication
The presence or absence of signal wire, the power supply module is powered according to the feedback signal of the energy supply control module to described from unit.
Further, the signal of communication line carries out signal transmission using the logic level of standard.
Further, when master unit is between unit without communicating, powered by signal of communication line.
Further, when master unit and between unit, have communication each other from unit when, communicate initiate communication mould
The port of block is set as output mode, when transmitting logical zero level on signal of communication line, and the port output that unit is initiated in communication is low
Level, monitors that the electric current of power supply output is reached after limit value, provides the control signal of setting, exported according to the control signal
Power supply or limitation output current；When transmitting logic high on signal of communication line, master unit that the communication is initiated or
High level is exported from the port of unit, the Current Voltage value of Power Monitoring Unit monitoring power supply module output feeds back to the confession
Electric module, the power supply module is powered by signal of communication line.
The system of the present invention being powered by signal wire at least has the advantages that：Above-mentioned passes through letter
The system that number line is powered by signal of communication line realize master unit, from unit each other, or from unit each other
Communication function.
Master unit, to being powered from unit, and possesses defencive function by signal of communication.
From unit by one-way conduction part from signal wire power taking, and energy storage section is carried, can guarantee that and be transmitted across in signal
When signal wire does not provide power supply in journey, from the normal operation of unit.
Brief description of the drawings
, below will be attached to what is used required in embodiment in order to illustrate more clearly of the technical scheme of the technical program
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ability
For the those of ordinary skill of domain, on the premise of not paying creative work, it can also be obtained according to these accompanying drawings other attached
Figure.
Fig. 1 is the function structure chart provided in an embodiment of the present invention that system is powered by signal wire；
Fig. 2 is provided in an embodiment of the present invention to be powered system by signal wire and include two function structure charts from unit；
Fig. 3 is the current sample amplification of the Power Monitoring Unit provided in an embodiment of the present invention that system is powered by signal wire
Circuit diagram；
Fig. 4 is that the Current Voltage of the Power Monitoring Unit provided in an embodiment of the present invention that system is powered by signal wire compares
Control circuit；
Fig. 5 is the circuit diagram of the power supply module provided in an embodiment of the present invention that system is powered by signal wire；
Fig. 6 is that the one-way conduction module provided in an embodiment of the present invention for being powered system by signal wire is realized by PMOS
Circuit diagram.
Embodiment
Below in conjunction with the accompanying drawing in the technical program embodiment, the technical scheme in the technical program embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the technical program, rather than whole
Embodiment.Based on the embodiment in the technical program, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of protection of the invention.
Refer to Fig. 1 and combine Fig. 2, Fig. 1 is powered system for described in by signal wire includes a firmly unit and one
It is individual from unit module structure chart.Fig. 2 is powered system by signal wire and lives unit and two from unit including one to be described
Function structure chart.In other examples, can also include three or more than three from unit.
The technical program provides a kind of system device being powered by signal wire, it include master unit 100, at least one
From unit 200, master unit 100 from property-line GND between unit 200 and signal of communication line SP with being each connected.
SP signals use the logic level of standard（Such as CMOS level, Transistor-Transistor Logic level etc.）Signal transmission is carried out, thus it is whole
The individual system signal processing circuit special without other.
Master unit 100 and at least one from unit 200；Master unit 100 from unit 200 by signal of communication line SP with being connected
Connect, master unit 100 at least includes power supply module 101, Power Monitoring Unit 102, principal communication module 103.Any one is from unit
200 at least include one-way conduction module 204 and from communication module 202.
Power supply module 101 accesses input power, and the control end of power supply module 101 and the output end of Power Monitoring Unit connect
Connect, the output end of one end connection power supply module 101 of signal of communication line, the input/output port A_RX/ of principal communication module 103
TX, the other end is connected with one end of the input/output port from communication module 202 and one-way conduction module 204, Power Supply Monitoring
The input of module 102 and output end and the SP connections of signal of communication line for being connected power supply module 101.
The input power of 101 pairs of accesses of power supply module carries out conversion processing, and the out-put supply after conversion is passed through into communication
Signal wire SP is exported.Current value, voltage that the monitoring power supply module 101 of Power Monitoring Unit 102 is exported by signal of communication line SP
Value, and control signal SW is sent to power supply module 101 by output end according to current value, magnitude of voltage, power supply module 101 is according to this
Control signal SW is controlled to the out-put supply after conversion processing.
Principal communication module 103 and from communication module 202 pass through signal of communication line SP receive and send the communication information.
The effect of one-way conduction module 204 is to irreversibly deliver the power supply on SP signal wires to the power supply from unit 200
On VCC1 networks, while preventing from, when SP signal wires are low-voltage, putting by SP signal wires from the power supply VCC1 networks of unit 200
Electricity.
Preferably, principal communication module 103 is identical with from the traffic rate of communication module 202.
When master unit 100 is between unit 200 without communicating, principal communication module 103 and the number from communication module 202
Word signal port is input pattern, and power supply module 101 is given from unit by signal of communication line SP and one-way conduction module 204
200 power supplies.
When master unit 100 and between unit 200, have communication each other from unit 200 when, communicate initiate master unit
100 or the port of communication module from unit 200 be set as output mode, when transmitting logic low on signal of communication line SP
When, the port output low level of unit is initiated in communication, and Power Supply Monitoring part monitors that the electric current of power supply output is reached after limit value,
Specific control signal is provided to power supply module 101, it is defeated that power pack receives out-put supply or limitation after the control signal
Go out electric current.
When transmitting logic high on signal of communication line SP, communicate the master unit 100 initiated or the end from unit 200
Mouth output high level, the Current Voltage value that the monitoring power supply module 101 of Power Monitoring Unit 102 is exported, feeds back to power supply module
101, power supply module 101 is powered by signal of communication line SP.
Preferably, principal communication module 103 and between communication module 202 by an input using standard logic levels
Output port realizes the transmission and reception to signal.It can be realized by way of being set forth below（Including but not limited to lower section
Formula）：1st, the pin that single-chip microcomputer possesses bi-directional communication function is realized；The pin TxD of such as single-chip microcomputer MC9S08SG series, it is possible to
It is configured to the communication pin of input and output.Or the communication pin of other chips for possessing similar functions.2nd, single-chip microcomputer is common
Two directions' inputing output pin.Master unit 100, from unit 200 arrange identical traffic rate.When some unit has information to need hair
When sending, communication pin is set as output mode by the unit, then be will send information to the speed of agreement on SP signal wires.And
The pin of the unit communication part of receive information is configured as input to pattern, and the level of SP signals is monitored with the speed of agreement, is sentenced
Broken height low state, and revert to the data of communication.
In another embodiment, Power Monitoring Unit 102 passes through a resistance being serially connected in power supply circuit, monitoring power supply
Current value that module 101 is externally exported by signal of communication line SP, SP signal voltage values, power supply is fed back to by control signal SW
Module 101.Power supply module 101 is controlled according to the control signal SW received to out-put supply, realizes protection master unit 100
The input/output port A_RX/TX of principal communication module 103 and the input/output port from communication module 202 from unit 200
B_RX/TX purpose.Avoid when the two ports are output as low-voltage, the high current that power supply module 101 directly pours into causes end
Mouth is damaged.
Referring to Fig. 3, in another embodiment, Power Monitoring Unit 102 includes current sample amplifying circuit, including sampling
Resistance Rsense, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the first amplifier U1.Current sample
Amplifying circuit is used to the output current of power supply module 101 being converted to amplification voltage.
Specifically, sampling resistor Rsense one end, first resistor R1 one end are connected to the output of power supply module 101
End, the sampling resistor Rsense other end, second resistance R2 one end are connected to signal of communication line SP；First amplifier U1 is just
Phase input and the other end of first resistor, 3rd resistor R3 one end and connection, 3rd resistor R3 other end ground connection；First
Amplifier U1 inverting input is connected with the second resistance R2 other end with the 4th resistance R4 one end；4th resistance R4 is in parallel
Between the first amplifier U1 output end and inverting input.
Wherein, first resistor R1 and second resistance R2 resistance are equal, 3rd resistor R3 and the 4th resistance R4 resistance phase
Deng.
The specific implementation process of such scheme is：VOUT is the supply voltage of the power pack of master unit 100 output, and VSP is
Voltage on SP signal wires.IS is the electric current for flowing through sampling resistor RsenseRsense.R1, R2 resistance value are ra, R3, R4 resistance
Value is rb.Circuits below is current sample amplifying circuit, and the power pack output current of master unit 100 is converted to the voltage of amplification
VS, wherein, 。
Referring to Fig. 4, Power Monitoring Unit 102 also includes comparison control circuit, comparison control circuit includes first
Comparator, the second comparator and and gate circuit, an input of first comparator is connected with the output end of the first amplifier, separately
One input accesses the corresponding voltage of default current limit value, an input incoming communication signal line of the second comparator
On voltage, another input access predeterminated voltage, with the output of two inputs of gate circuit respectively with first comparator
End, the output end connection of the second comparator, are connected, output control letter with the output end of gate circuit and the control end of power supply module
Number.
Comparison control circuit specific implementation process is：Amplify voltage VS voltages corresponding with current limit value set in advance
V_IREF compares.Realize that VC1 is high level, works as sampling when the electric current IS for flowing through sampling resistor Rsense is less than current limit
When resistance Rsense electric current IS is more than current limit value, VC1 is low level.
VSP and default V_VREF level are compared, and realize that VC2 is low level when VSP is less than V_VREF, when VSP is big
When V_VREF, VC2 is high level.
VC1 and VC2 signals phase feeds back to the power unit of master unit 100 with producing SW signals.
Referring to Fig. 5, in another embodiment, power supply module 101 includes voltage-stablizer LDO and relay RL1, relay
RL1 is connected to voltage-stablizer LDO output end, voltage-stablizer LDO input access input power, relay RL1 input with
Voltage-stablizer LDO output end connection, control end incoming control signal SW, relay RL1 output end are the defeated of power supply module 101
Go out end, relay RL1 is according to the presence or absence of control signal SW controls output to the power supply on signal of communication line SP..
Such scheme is that detailed process is：When signal of communication line SPSP is without communication, SP signals are high level.VSP is more than
During V_VREF, VC2 is high level.IS is less than current limit, and VC1 is high level, VOUT normal power supplies.When having communication on SP signals
When, when transmission signal is switched to low level, circuit monitoring to IS is more than current limit, and VC1 is low level；VSP is less than V_
VREF, VC2 are low level.SW is low level.RL1 disconnects, and VOUT power supplys are without outputing.Now monitor that electric current becomes for 0, VC1
For high level, but VSP is still low level, therefore VOUT power supplys can be always without output.When SP signals revert to high level,
SW signals are changed into high level again, and VOUT restores electricity.
In another embodiment, one-way conduction module 204 include diode, signal of communication line SP high level voltages be less than etc.
In the maximum voltage value for allowing to input from the port of unit 200.Which advantage is easy, only one of which element, now, the high electricity of SP
Ordinary telegram pressure, which is no more than, allows the maximum voltage value of input from the port of unit 200.
Referring to Fig. 6, one-way conduction module 204 can also be that concrete scheme when being realized by pmos circuit is, it is single
Also include to conduction module 204 the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, PMOS and triode Q2, PMOS
The D poles of pipe, the 5th resistance R5 one end connection communication signal wire SP, the 5th resistance R5 other end, the 6th resistance R6 one end
It is connected with triode Q2 base stage, the 6th resistance R6 other end, triode Q2 grounded emitter；G poles, three poles of PMOS
Pipe Q2 colelctor electrode is connected with the 7th resistance R7 one end, and the S poles of PMOS, the 7th resistance R7 other end are connected, as
The output end of the one-way conduction module 204.The detailed process realized by pmos circuit is：When SP is high level, pass through
R2, R3 resistance turn on Q2.Q1 PMOS G poles pull down to GND, Q1 conductings.Realize that conductings of the SP to VCC1 is powered.When SP letters
Number be low level when, Q2 by.Q1 G poles and S are extremely without voltage difference, Q1 cut-offs.It is breaking between SP signals and VCC1, it is effectively anti-
Only VCC1 power supplys are counter is poured on SP signals.
When which is a little conducting, the pressure drop between SP and VCC1 is very small, it is not necessary to the electricity on especially processing SP
Source voltage prevents overvoltage from causing COM1 to damage.
Also include energy-storage module 201 from unit 200, one end of energy-storage module 201 is connected to the defeated of one-way conduction module 204
Go out end, the other end ground connection of energy-storage module 201.Energy storage section major function is：When SP signal wires are low-voltage, it is impossible to terminal
There is provided the power supply from the normal work of unit 200 when unit is powered.When signal of communication line SP is low-voltage, energy-storage units are powered
To from unit 200.Energy-storage module 201 is rechargeable battery or electric capacity.Using electric capacity, it is necessary to which the capacity of electric capacity will be supported enough
From unit 200 in communication process normal work.Using rechargeable battery, advantage is in big more of capacity specific capacitance, when can be long
Between support to work from unit 200.
Power supply, communication detailed process described in the embodiment of the present invention please be seen below.
When master unit 100 is between unit 200 without communicating, SP signal wires are constantly in high level state.Master unit
The port B_RX/TX of the A_RX/TX ports of 100 communications portion 103 and communications portion 202 from unit 200 is both configured to
Input pattern, power pack 101 is powered by SP signal wires and one-way conduction D1 from unit 200.
In input mode, its input resistance is very big, flows into the electric current of port for port A_RX/TX and B_RX/TX work
It is very small, it will not be damaged because of electric current reason.
The input voltage of port allows to allow port to input in the operating voltage more than corresponding units, general electronic system
Voltage is more than operating voltage 0.3V.The voltage externally provided when power pack is more than the operating voltage of master unit 100 and from unit
200 operating voltage, while when being less than the operating voltage+0.3V of the master unit 100 and operating voltage+0.3V from unit 200 again
Port will not be caused to damage.
The power supply of power pack 101 allows terminal unit normal work, while part electrical power storage is in energy storage section 201.
Energy storage section 201 can be that electric capacity, rechargeable battery etc. are constituted, and the energy of storage maintains terminal list when SP order wires are low
The normal operation of member.
When master unit 100 and from when having communication each other between unit 200 or from unit 200, unit is initiated in communication
Port working under output mode, and the port for receiving signal element remains unchanged work in input mode.
When on SP signal wires transmit logic low when, communication initiate unit port output low level, now can by for
The port that electric partial power initiates unit by communicating pulls down to low-voltage, and the output current of power pack can continue to increase.This
Power Supply Monitoring part monitors that the electric current of power supply output is reached after limit value when individual, provides specific control signal SW to power supply
Part, power pack receive after the control signal close out-put supply or limitation output current by way of, reach guarantor
Taken care of hair unit port function.
When transmitting logic high on SP signal wires, the port output high level of unit is initiated in communication, and now voltage is supervised
Control part is monitored after the electric current of power supply output, voltage, provides control signal SW to power pack, power pack recovers normal and supplied
Power mode.After the completion of communication, communication initiates unit and COM1 is switched into input pattern.
System by signal of communication line realize master unit 100, from unit 200 each other, from unit 200 each other
Communication function.
Master unit 100, to being powered from unit 200, and possesses defencive function by signal of communication line SP.
From unit 200 by one-way conduction part from signal wire power taking, and energy storage section is carried, can guarantee that in signal transmission
During signal wire when not providing power supply, from the normal operation of unit 200.
The present invention also provides a kind of method being powered by signal wire, for master unit 100 and at least one from list
Power supply between member 200, it includes step：Input power is converted into needed for unit 200 by the master unit 100 processing
Operating voltage；When master unit 100 is between unit 200 without communicating, by signal of communication line SP to described from unit 200
Power supply；According to the presence or absence of described signal of communication line SP, the power supply module 101 is according to the feedback signal of the energy supply control module
It is powered to described from unit 200.
The signal of communication line SP carries out signal transmission using the logic level of standard.
The method being powered by signal wire also includes step, when master unit 100 and between unit 200 without communication
When, powered by signal of communication line SP.
When master unit 100 and between unit 200, have communication each other from unit 200 when, communicate initiate communication mould
The port of block is set as output mode, when transmitting logical zero level on signal of communication line SP, and the port output of unit is initiated in communication
Low level, monitors that the electric current of power supply output is reached after limit value, provides the control signal of setting, defeated according to the control signal
Go out power supply or limitation output current；When transmitting logic high on signal of communication line SP, the master unit that the communication is initiated
100 or export high level, the Current Voltage that the monitoring power supply module 101 of Power Monitoring Unit 102 is exported from the port of unit 200
Value, feeds back to the power supply module 101, the power supply module 101 is powered by signal of communication line SP.
The system that the method being powered above by signal wire is powered by signal wire passes through signal of communication line SP
With ground wire GND realize master unit 100, from unit 200 each other, or the communication function from unit 200 each other.
Master unit 100, to being powered from unit 200, and possesses defencive function by signal of communication.
From unit 200 by one-way conduction part from signal wire power taking, and energy storage section is carried, can guarantee that in signal transmission
During signal wire when not providing power supply, from the normal operation of unit 200.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, one of ordinary skill in the art is when understanding：It still can be with
Technical scheme described in foregoing embodiments is modified, or equivalent substitution is carried out to which part technical characteristic；And
These modifications are replaced, and the essence of appropriate technical solution is departed from the spirit and model of various embodiments of the present invention technical scheme
Enclose.
Claims (10)
1. a kind of system being powered by signal wire, it is characterised in that including：Master unit and at least one from unit；Institute
State master unit to be connected by signal of communication line from unit with described, the master unit at least includes power supply module, Power Supply Monitoring mould
Block and principal communication module, any one at least includes one-way conduction module from unit and from communication module；The power supply module
Input power is accessed, the control end of the power supply module and the output end of Power Monitoring Unit are connected, the signal of communication line
One end connects the output end of the power supply module, the input/output port of the principal communication module, the other end with it is described from communication
One end connection of the input/output port of module and the one-way conduction module, the input of the Power Monitoring Unit and institute
State output end and the signal of communication line connection of connection power supply module；The power supply module is carried out to the input power of access
Conversion processing, and the out-put supply after conversion is exported by signal of communication line；The Power Monitoring Unit monitors the power supply
Current value that module is exported by the signal of communication line, magnitude of voltage, and according to the current value, magnitude of voltage by output end to
The power supply module sends control signal, and the power supply module is carried out according to the control signal to the out-put supply after conversion processing
Control；The principal communication module and described the communication information is received and sent by the signal of communication line from communication module.
2. the as claimed in claim 1 system being powered by signal wire, it is characterised in that when master unit with from unit it
Between without communication when, the principal communication module and it is described from the input/output port of communication module be input pattern, the power supply
Module is powered by signal of communication line and one-way conduction module to described from unit.
3. the as claimed in claim 1 system being powered by signal wire, it is characterised in that when master unit with from unit it
Between, from unit have communication each other when, communicate the master unit initiated or the input/output port of communication module from unit
For output mode, the input/output port for receiving the master unit of signal of communication or the communication module from unit is input pattern；
When transmitting low level on signal of communication line, the Power Monitoring Unit monitors that the electric current of out-put supply reaches limit value
Afterwards, send control signal to the power supply module, the power supply module receive closed after the control signal out-put supply or
Limit output current；When transmitting high level on signal of communication line, the Power Monitoring Unit monitors that the power supply module is defeated
After the current value that goes out, magnitude of voltage, control signal is sent to the power supply module, the power supply module recovers according to the control signal
Normal power supply pattern, is powered by the signal of communication line.
4. the as claimed in claim 1 system being powered by signal wire, it is characterised in that the principal communication module and from
The traffic rate of communication module is identical.
5. the system being powered by signal wire as described in claim any one of 1-4, it is characterised in that the power supply prison
Controlling module includes current sample amplifying circuit, and the current sample amplifying circuit includes sampling resistor, first resistor, the second electricity
Resistance, 3rd resistor, the 4th resistance, the first amplifier；One end of the sampling resistor, one end of the first resistor are connected to institute
The output end of power supply module is stated, the other end of the sampling resistor, one end of the second resistance are connected to the signal of communication
Line；The normal phase input end of first amplifier and the other end of the first resistor, one end of the 3rd resistor and it is connected,
The other end ground connection of the 3rd resistor；The inverting input of first amplifier and the other end of the second resistance and the
One end connection of four resistance；4th resistor coupled in parallel is between the output end and inverting input of first amplifier.
6. the system as claimed in claim 5 being powered by signal wire, it is characterised in that the Power Monitoring Unit is also
Including comparison control circuit, including first comparator, the second comparator and and gate circuit, an input of the first comparator
End is connected with the output end of first amplifier, and another input accesses the corresponding voltage of default current limit value, institute
The voltage that an input of the second comparator is accessed on the signal of communication line is stated, another input accesses predeterminated voltage,
Output end, the output end of second comparator of two inputs of described and gate circuit respectively with the first comparator connect
Connect, it is described to be connected with the output end of gate circuit with the control end of the power supply module, export the control signal.
7. the system as claimed in claim 6 being powered by signal wire, it is characterised in that the power supply module includes phase
The voltage-stablizer and relay connected, the input access input power of the voltage-stablizer, the input of the relay with it is steady
The output end connection of depressor, control end access the control signal, and the output end of the relay is the defeated of the power supply module
Go out end, the relay is according to the presence or absence of control signal control output to the power supply on signal of communication line.
8. the system as claimed in claim 1 being powered by signal wire, it is characterised in that the one-way conduction module bag
Diode is included, the signal of communication line is inputted to the high level voltage from unit to be allowed to input less than or equal to described from unit port
Maximum voltage value.
9. the system as claimed in claim 1 being powered by signal wire, it is characterised in that the one-way conduction module bag
Include the 5th resistance, the 6th resistance, the 7th resistance, PMOS and triode, the D poles of the PMOS, the 5th resistance
One end connects the signal of communication line, the base stage of the other end of the 5th resistance, one end of the 6th resistance and triode
Connection, the other end of the 6th resistance, the grounded emitter of the triode；The G poles of the PMOS, the triode
Colelctor electrode is connected with one end of the 7th resistance, and the S poles of the PMOS, the other end of the 7th resistance are connected, and are used as this
The output end of one-way conduction module.
10. the system as claimed in claim 1 being powered by signal wire, it is characterised in that described also to include from unit
Energy-storage module, one end of the energy-storage module is connected to the output end of the one-way conduction module, the energy-storage module it is another
End ground connection, when the voltage on the signal of communication line is that low-voltage can not be to power from unit, the energy-storage units are supplied electricity to
It is described from unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710630537.XA CN107196770B (en) | 2017-07-28 | 2017-07-28 | System for supplying power through signal wire |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710630537.XA CN107196770B (en) | 2017-07-28 | 2017-07-28 | System for supplying power through signal wire |
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| CN107196770A true CN107196770A (en) | 2017-09-22 |
| CN107196770B CN107196770B (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710630537.XA Active CN107196770B (en) | 2017-07-28 | 2017-07-28 | System for supplying power through signal wire |
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| Publication number | Publication date |
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| CN107196770B (en) | 2020-08-04 |
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