CN208239974U - The main website machine device for providing power supply simultaneously using two lines bus and being communicated - Google Patents
The main website machine device for providing power supply simultaneously using two lines bus and being communicated Download PDFInfo
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- CN208239974U CN208239974U CN201820036159.2U CN201820036159U CN208239974U CN 208239974 U CN208239974 U CN 208239974U CN 201820036159 U CN201820036159 U CN 201820036159U CN 208239974 U CN208239974 U CN 208239974U
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Abstract
It is a kind of to use the main website machine device that two lines bus provide power supply simultaneously and be communicated, the voltage modulation signal of section and low pressure guarantee power supply section building is modulated by high-voltage signal by being modulated into downlink signal, it realizes that main website machine device provides the invention task of power supply by two lines bus completion with the communication of a slave station group of planes and to a slave station group of planes, the modulation of high-power downlink voltage signal is realized by main website machine equivalent electrons switching circuit；By receiving sampling element using the minimum inductance LM1 of D.C. resistance, ascending current modulated signal use by differential circuit decomposite the rising edge come and failing edge be compared and enlarged after with software differentiate demodulation, realization is high-power, heavy load, at a distance under communication.The utility model only needs two conducting wires, can not only communicate but also provide power supply, and traffic rate is high, distance is remote, can be widely used in the Internet of things system for allowing to be routed.
Description
Technical field
A kind of main website machine device for providing power supply simultaneously using two lines bus and being communicated.
Background technique
There is known a kind of M-BUS interface circuits to use two ray modes, can simultaneous transmission information and power supply.This interface circuit
Communication function and function of supplying power are gathered together, only need two conducting wires, it is very convenient, be applied to more and more equipment it
Between communication and management on.The circuit is by master station and slave station mechanism at master station is when sending information to slave station machine using electricity
Pressure modulation, and current-modulation is used when receiving the information that slave is sent.But at least following defect of this circuit, affects and answers
With range:
Firstly, demodulation needs in main power supply circuit when receiving current signal (variable-current for usually having 10mA to 50mA)
Seal in a sample resistance, although this resistance very little, usually only several to tens ohm, when host with it is multiple from
When machine, the variation of load and the load of each slave can constitute the curent change for flowing through sample resistance, all can be in sampling electricity
Hinder the bias voltage that both ends generate a variation.Slave is often increased or decreased all and can change the voltage on sample resistance, and it is each
The load variation of slave during the work time will also become the variable signal on sample resistance, although load variation can pass through
Filter capacitor is subject to smoothly, but the voltage bias generated can not be eliminated.Then, once the knots modification of load current is more than communication letter
(10mA to 50mA), the circuit just can not work normally for number electric current.This defective effect circuit more slave use occasions with
And the use of heavy load occasion.Pressure drop on sampling resistor simultaneously, directly reduces the working power of slave, influences more slave occasions
It uses.
Secondly, power is difficult to do greatly.When host module should be with power be carried, when communicating again, power supply will affect logical
Letter, to limit the power supply supply power of system.
No. 201610134844.4 applications for a patent for invention of the present inventor, propose it is a kind of using two lines and meanwhile transmit information with
The circuit of power supply.But this circuit lacks the cooperation of slave circuit, and when increasing power supply, load can consume communication letter
Breath limits the increase of supply power supply；Meanwhile the circuit receives circuit and is completed by the mode of an inductance and resistor coupled in parallel,
Sensitivity is not high, influences big load occasion and receives demodulation, influences practical application.
Summary of the invention
Problem to be solved in the utility model: the purpose of this utility model be invent a kind of two lines bus, can adaptive strain
Main website machine device change working under load, not influenced by heavy load, can communicating but also supply power supply.
It is a kind of to provide power supply simultaneously using two lines bus and the main website machine device that is communicated at least receives slave station electromechanics stream
The inductance L of modulated signalM1, have the equivalent electrons switch unit K switched over according to descending communication signal to be modulatedM2, feature
It is:
A, main website machine [M] downlink voltage modulation signal is the high voltage section and guarantee slave station by modulation downlink communication information
What the low-voltage section of machine power supply was constituted；
B, main website machine [M] ascending current signal receiving circuit, which has, is serially connected in adopting for two lines bus BUSL1 and voltage modulation circuit
Sample inductance LM1；
C, main website machine [M] ascending current signal receiving circuit has capacitor CM1, resistance RM1With capacitor CM2, resistance RM2It constitutes
Differential current pulse has the comparison amplifier A of acquisition ascending current modulated signal failing edge and rising edge along circuit is receivedM2With
AM1；
D, the comparison amplifier A of ascending current modulated signal failing edge and rising edge is acquiredM2And AM1Having can be by micro process
The bias voltage V of circuit unit [1] controlM1And VM2。
The main website machine device for providing power supply simultaneously using two lines bus and being communicated, at least sampling inductance LM1, unidirectionally lead
Electrical part DM1, it is characterized in that:
A, when in two lines bus BUSL1 by equivalent electrons switch unit KM2Disconnection and VHConnection after, two lines bus level "0" is
By diode DM1Pull down what power supply was realized in two lines bus load；
B, during main website machine [M] downlink voltage modulation signal is sent, equivalent electrons switch KM1Inductance L will be sampledM1Deng
Effect is shorted.
The main website machine device for providing power supply simultaneously using two lines bus and being communicated, two numbers at least controlled by MCU
Word voltage output DA1 and DA2, it is characterized in that:
A, comparison amplifier AM2、AM1Have by the bias voltage V of DA1 and DA2 controlM2And VM1；
B, digital voltage DA1 and the DA2 output of automatic adjustment are to add to triode Q13, Q14 base stage, by changing three poles
Pipe base voltage changes collector current in turn, then generates adjustable comparison amplifier biased electrical compacting by the collector current
Existing.
Use the level "0" voltage in voltage modulated in the main website machine device that two lines bus provides power supply simultaneously and is communicated
Generation circuit, at least one limiting circuit being made of resistance R17 and triode Q8, it is characterized in that:
A, triode Q8 is a PNP type triode, transistor base by resistance R17 directly and VLIt is connected；
B, the emitter of triode Q8 connects on the supply line of two lines bus BUSL1 by a nonessential diode, three poles
The collector of pipe Q8 is supplied to discharge circuit use.
It is produced using the level"1" voltage in the main website machine device voltage modulated that two lines bus provides power supply simultaneously and is communicated
Raw circuit, at least one drive source circuit being made of triode Q3, it is characterized in that:
A, driving triode Q3 collector is to be connect by current-limiting resistance R5 than VHOn low 2V~5V voltage source；
B, the emitter of pliotron Q1, Q2 is connected to the identical flows resistance of resistance value.
Detailed description of the invention
Fig. 1 is the configuration diagram of Tthe utility model system.[U] represents the host computer of system in figure, is the utility model
The administrative center that system power supply supply is provided in whole system, completes data management, acquisition, control.[M] is main website machine；[S]
It is the general name of a slave station group of planes, some slave station machine in a slave station group of planes can be represented with Sn.Uo-Mi is host computer [U] hair in Fig. 1
The information flow of main website machine is given, also includes being sent by [U] wherein both including the downlink information for the slave station machine [S] in system that is handed down to
To the command information executed by main website machine [M] of [M]；The information is it is also assumed that be the input information of [M]；Ui-Mo is main website
Machine [M] is sent to the information of host computer [U]；The information is it is also assumed that be the input information of [U].REQ is the utility model
Embodiment dedicated pin information.
Fig. 2 is the schematic block circuit diagram of the utility model one embodiment.[1] is the micro process in main website machine [M] in figure
Circuit unit.It [2] is the power supply unit in host computer [U], downlink voltage modulation signal is made of two voltage sections.[3]
It is the telecommunication management center cell in host computer [U], is that Tthe utility model system completes system operational objective, realizes human-computer dialogue
System hinge.It [4] is downlink voltage modulation signal demodulator circuit unit in slave station machine [S].It [5] is upper in slave station machine [S]
Row signal code modulation circuit unit.[6] it is core processing circuit unit in slave station machine [S]；It is not only completed and main website machine
The application function task of slave station machine is also completed in the management of the two-way communication of [M].
Fig. 3 is the embodiment schematic diagram of main website machine [M] downlink voltage modulation signal.Uo-Mi is from host computer in figure
Downlink signal to be modulated, Mo-Si are the voltage modulation signals that slave station machine [S] is sent to after main website machine [M] is modulated.
Fig. 4 is a partial circuit embodiment electrical schematic diagram in main website machine [M].Triode Q1, Q2, Q3, Q12, resistance
R1, R2, R3, R4, R20, R21, R27, (P01 is a specific embodiment I/O pin to an output I/O pin P01 in MCU
Arbitrariness code name does not refer exclusively to the pin of a specific single-chip microcontroller) it is control pin, it is built into equivalent electronic switching unit in Fig. 1
KM2Partial function unit.MCU is the component part of micro-processor interface circuit unit [1].
Fig. 5 is equivalent switch KM1One embodiment.
Specific embodiment
Illustrate how the utility model is implemented below by the explanation to Figure of description.
Fig. 1 is the configuration diagram of Tthe utility model system.[U] represents the host computer of system in figure, is the utility model
The administrative center that system power supply supply is provided in whole system, completes data management, acquisition, control.[M] is main website machine.It is first
It first completes to carry out voltage modulated to the downlink signal from host computer, realizes power supply and the modulation of downlink information；Secondly complete from
The ascending current signal that machine [S] is sent of standing demodulates；Again, main website machine modular unit will also be completed in the active of slave station machine [S] emergency
It notifies identification, demodulation, forwarding and the distribution of breath；It completes other to request to host computer, set busy etc. task, is the utility model system
The core apparatus of system.[S] is the general name of a slave station group of planes, some slave station machine in a slave station group of planes is represented with Sn.Uo-Mi in Fig. 1
It is the information flow that host computer [U] is sent to main website machine [M], wherein both having included the downlink letter for the slave station machine [S] in system that is handed down to
Breath also includes the command information executed by main website machine [M] that [M] is sent to by [U]；The information is it is also assumed that be the defeated of [M]
Enter information；Ui-Mo is the information that main website machine [M] is sent to host computer [U]；The information is it is also assumed that be the input information of [U].
REQ is one embodiment dedicated pin information of the utility model, and being one may include the pin that can also do not include.One
There is the embodiment of REQ, when allowing the dynamic initiation of slave station owner to report request, main website machine [M] is receiving the emergency request of slave station machine
When can by REQ pin export request, by main website machine [M] generate REQ "Yes" level (one embodiment, in the effective "Yes" of REQ
During level, REQ pin is set to low level, and without request when is high level) it is sent to host computer [U].Mo-Si is main website machine
[M] can be modulated into when receiving host computer [U] sending, downlink information that be sent to slave station machine [S] by two voltage section structures
At voltage modulation signal.This voltage modulation signal is made of two voltage sections: high voltage section is by modulates information, and low pressure stage
Then guarantee that slave station machine obtains the power supply higher than this voltage source always.Mi-So is the electricity that slave station machine [S] is sent to main website machine [M]
Flow modulated signal.
Fig. 2 is the schematic block circuit diagram of the utility model one embodiment, can be used to illustrate the realization of the utility model
Process.[1] is the micro-processor interface circuit unit in main website machine [M] in figure.It is completed: the modulation control of downlink voltage signal, uplink
The demodulation control processing of current signal receives information and forwarding information, completes acquisition, coordination, processing and the management of information.[2]
It is the power supply unit in host computer [U], downlink voltage modulation signal, mainly by two voltage section electric power generating compositions.Described two
A voltage section is respectively as follows: by △VHThe signal modulation section of downlink voltage modulation signal is provided, this section of voltage difference section is for modulating
Signal；Another low pressure guarantees the voltage section of section, by power supply VLIt is minimum to provide safeguard bus necessary to slave station machine works
Operating voltage source of stable pressure.[3] it is the telecommunication management center cell in host computer [U], is that Tthe utility model system completes system fortune
Row target realizes interactive system hinge.It [4] is downlink voltage modulation signal demodulator circuit unit in slave station machine [S].
[5] it is uplink signal current modulating circuit unit in slave station machine [S].[6] it is core processing circuit list in slave station machine [S]
Member；It is not only completed the two-way communication management with main website machine [M], also completes the application function task of slave station machine.
In Fig. 2 main website machine [M], KM2It is equivalent electrons switch unit.The downlink issued by [U] received according to [M]
Signal of communication: when logic level is " 1 " and " 0 ", it is respectively turned on VHPower supply and VLPower supply realizes voltage described in the utility model
Modulation.One embodiment connects two lines bus input/output terminal BUSL1 and (passes through inductance L when signal logic is " 1 "M1) to VH
Power supply；When signal logic is " 0 ", connects two lines bus input/output terminal BUSL1 and (pass through inductance LM1) to VLPower supply；Due to VH
It is to splice in VLOn, the voltage Duan Jun of signal is modulated with more than VLPart, thereby may be ensured that two lines bus BUSL1 and
It is remained between BUSL2 and has more than VLSupply voltage.Unilateal conduction device DM1Electric current can be prevented to VLFlow backward, it can also
With guarantee BUSL1 not and VHDuring connection, provided from the unilateal conduction device to two lines bus close to VLLevel output.Electricity
Feel LM1In KM2The extra pulse of a failing edge and rising edge can be generated in voltage handoff procedure, this extra pulse is many times just
Be conducive to well have in mated condition in bus there are the equivalent capacitor electric discharge and charging to come of distribution capacity and other load-sides
Positive effect.When needing to reduce influences, one embodiment of the utility model, design has equivalent electrons switch KM1, it is in master
It stands during machine [M] receives the downlink voltage signal Uo-Si that host computer [U] transmitting-receiving comes and is shorted, and discharged during no downlink signal,
It prepares for the ascending current modulation intelligence So-Mi that reception [S] is sent.During this, [M] is changed into reception by transmission, needs [M]
Reserve a switching delay time.
Unilateal conduction device DM1One embodiment be a diode；Unilateal conduction device DM1One embodiment be
Triode, field-effect tube and switching tube with unilateal conduction characteristic.
In Fig. 2 main website machine [M], capacitor CM1、RM1Constitute wherein differential circuit all the way, capacitor CM2、RM2Constitute another way differential
Circuit, comparison amplifier AM1、AM2, adjustable bias power supply VM1、VM2, and sampling inductance LM1The utility model master is constructed jointly
Stand machine [M] electric current demodulation embodiment circuit unit.Sample inductance LM1D.C. resistance it is very small, up to micro-ohm grade, thus flow
It is very small to cross the direct current pressure drop that the major loop load current of the inductance generates on inductance, to the shadow for comparing amplifier bias voltage
Sound is very small, so that the device of the utility model can be widely applied to big load application.When [S] sends ascending current modulation
When square-wave signal, in inductance LM1, capacitor CM1, resistance RM1Under the action of, a differential signal is generated, comparison amplifier is added in
AM1Input terminal, and bias voltage VM1It is added on another input pin of comparison amplifier, generates the input electricity of comparison amplifier
Pressure biasing.Fig. 2 is one embodiment, in this embodiment, comparison amplifier AM2By VM2A negative voltage bias is produced,
Comparison amplifier AM2It can verify the failing edge of ascending current source signal；Comparison amplifier AM1By VM1Produce one it is just defeated
Enter voltage bias, comparison amplifier AM1It can verify the rising edge of ascending current modulated signal.Pass through micro-processor interface circuit in [M]
The judgement and processing of unit [1] can demodulate ascending current signal TX；TX is the information after the demodulation of ascending current information,
It is sent to host computer [U].Payload size between two lines bus BUSL1 and BUSL2 will affect input comparison amplifier AM1With
AM2Detection sensitivity.When two lines bus load is very heavy, useful signal and interference signal can all reduce；And when loading very light, have
Imitating signal and interference signal all can be very strong.Such as in different loads with identical bias voltage, then, it is suitable in load weight
Bias voltage may detect interference as signal when load is light, it is also possible to be influenced to demodulate by wide edge, it is also possible to
Disturbed signal interference and mistuning solution.The utility model is using automatic adjustment bias voltage VM1And VM2.To guarantee current signal side
The demodulation on edge, one embodiment of the utility model, it is characterized in that in sampling inductance LM1Both ends are parallel with a capacitor CM, protect
Card has a best resonance point, and the resonance promise rising edge when ascending current signal rising edge and failing edge occur
Signal and failing edge signal have optimal width and amplitude.
The utility model sampling element uses the very small inductance element of D.C. resistance, and ascending current modulated signal solution
It adjusts, uses the rising edge and failing edge exported by comparison amplifier, and these " edges " as long as in circuit all with the presence of inductance
Can exist, thus can be used under big load circumstance.
Fig. 3 is the embodiment schematic diagram of main website machine [M] downlink voltage modulation signal.Uo-Mi is from host computer in figure
Downlink signal to be modulated, Mo-Si are the voltage modulation signals that slave station machine [S] is sent to after main website machine [M] is modulated.Modulated letter
It number is made of two voltage sections.Wherein △VHVoltage signal modulation section is used for signal modulation, is the section for having signal；It is another
A low pressure guarantees section, by power supply VLProvide safeguard the minimum working voltage source of bus necessary to slave station machine works.
Fig. 4 is one embodiment electrical schematic diagram of main website machine [M].Triode Q1, Q2, Q3, Q12, resistance R1 ... R2,
R3, R4, R20, R21, R27, (P01 is the arbitrariness of a specific embodiment I/O pin to an output I/O pin P01 in MCU
Code name does not refer exclusively to the pin of a specific single-chip microcontroller), it is built into equivalent electronic switching unit K in Fig. 1M2Partial function unit.
MCU is then a component part in [M] in micro process micro-processor interface circuit unit [1].Receiving downlink signal in MCU is " 1 "
When, or when the Idle state level signal in " 1 " signal, P01 sets high level, passes through resistance R27, R20, triode Q12 drives
Dynamic Q3, then by Q3 driving power triode Q1, Q2, by inductance LM1, the BUSL1 of two lines bus is connected to VHOn level, export " 1 "
Signal level is also provided close to VHPower supply supply.By triode Q8, Q9, Q10, Q11, resistance R17, R18, R24, R25,
R19, R26, R28 and diode D2, and (P02 is also a specific embodiment IO by some output I/O pin P02 in MCU
The arbitrariness code name of pin does not refer exclusively to the pin of a specific single-chip microcontroller) control, it is built into equivalent electronic switching unit in Fig. 1
KM2Another part voltage modulated functional unit.
When it is " 0 " that MCU, which receives downlink signal to be modulated, one embodiment of voltage modulated process:
P01 is first set low level by the first step, cuts off VHWith the access of BUSL1；
P02 pin is set high level by second step.The high level passes through resistance R28, triode Q11, Q9, resistance R24, drive
Dynamic pliotron Q10, current-limiting resistance R18 complete BUSL1 being pulled to VLThe circuit task of level.In the utility model embodiment
In circuit, triode Q8, diode D2 and resistance R17 constitute a limitation pliotron and are lower than V in BUSL1LWhen level not
The protection limiting circuit of conducting: when BUSL1 is changed into level "0" output by level"1" output, BUSL1 is also in VHLevel,
Diode D2 forward conduction, the emitter level of triode Q8, which can be higher than, is connected to V by resistance R17LQ8 base stage, make triode
Q8 is in saturation conduction state, so that triode Q11, Q9 is connected between P02 high period, it can be with driving power triode
Q10 conducting, and then the level of BUSL1 is pulled to by output power diode D by power current-limiting resistance R18M1Conducting, realization pass through
BUSL1 is sent to slave station machine close to VL" 0 " signal level of level.This invention design exists between BUSL1 and BUSL2 to divide
When cloth capacitor, it can greatly improve failing edge.Load between two lines bus also can power-assisted failing edge and downlink voltage modulated " 0 " signal
The foundation of level.One K of the utility modelM2In the embodiment of equivalent electrons switch unit, signal level " 0 " is in pulldown function
Load makes power diode D between circuit and two lines busM1Conducting and clamper are close to VLIt is realized on level.
Level "0" voltage generation circuit in the main website machine device in voltage modulated, at least one by resistance R17 and
The limiting circuit that triode Q8 is constituted, it is characterized in that:
A, triode Q8 is a PNP type triode, transistor base by resistance R17 directly and VLIt is connected；
B, the emitter of triode Q8 connects on the supply line of two lines bus BUSL1 by a nonessential diode, three poles
The collector of pipe Q8 is supplied to discharge circuit use.
Powerful one embodiment may be implemented in the main website machine of the utility model, and power supply is by function during two lines bus is idle
Rate triode Q1, Q2 realize that wherein resistance R1 ... R2 is flows resistance, and one embodiment, R1 ... R2 is 0.1 to 0.5 Europe
Nurse resistance；Among these in Q1, Q2 and R1 ... R2 representative can have more pliotrons and resistance and connect；And connect with
Afterwards, the electric current that each pliotron flows through is split, and pressure drop is greatly lowered, single power tube small power consumption, and combined power
It can be made very big, realize that middle low power triode completes powerful target.Resistance R1 ... R2 is serially connected in the hair of triode
Emitter-base bandgap grading can play and flow through the effect that each triode in parallel flows: if the collector current of one of triode is big, in institute
Stating ohmically pressure drop will increase, and will reduce the Veb voltage of the triode, to reduce the mesh that collector current reaches stable
Mark.Q3 provides big admittance driving source to Q1, Q2, and Q3 collector is connected on VCC by resistance R5, in order to limit the power consumption of Q3,
One embodiment VCC is that V is compared in selectionHLow 2 to 5V independent power supply.
One in Fig. 2 is removed adjust automatically comparison amplifier A by microprocessing unit circuit [1]M1、AM2Bias voltage
Circuit embodiments can be illustrated by Fig. 4 embodiment: in this main website machine [M] of Fig. 4, pass through DA function by microprocessing unit MCU
I/O port exports biased digit the voltage source DA1 and DA2 controlled by internal digital.Digital voltage source DA1 passes through triode
Q13, resistance R22 generate a collector constant current；This constant current is in resistance RM2One comparison amplifier A of upper generationM2Bear it is defeated
Enter to hold bias voltage VM2；By capacitor CM2, resistance RM2The differential circuit of composition, received signal and bias voltage send ratio together
Compared with amplifier AM2；When the failing edge of slave station machine ascending current modulated signal arrives, when bias voltage is suitble to, the comparison is put
Big device AM2The failing edge pulse amplifying of ascending current signal can be exported, by triode Q5, Q7 and resistance R10, R13, R16,
R14 will be converted into INT1 processing signal along signal level and MCU is sent to handle.Digital voltage source DA2 passes through triode Q14, resistance
R23 generates a collector constant current；This constant current generates a comparison amplifier A on resistance R7M1Positive input terminal biasing
Voltage (negative input end adds negative bias) VM1；By capacitor CM1, resistance RM1The differential circuit of composition, received signal and biased electrical
Pressure send comparison amplifier A togetherM1；When the rising edge of slave station machine ascending current modulated signal arrives, when bias voltage is suitble to,
The comparison amplifier AM1The rising edge pulse of ascending current signal can be amplified output, by triode Q4, Q6 and resistance
R9, R11, R15, R12 will be converted into INT2 processing signal along signal level and MCU sent to handle.C3 is used for bias voltage in Fig. 4
Filtering.
In Fig. 4, constructed by triode Q12, driving triode Q3, pliotron Q1 ... Q2 plus resistive element
When MCU sets high P01, two lines bus is connected to VHOne embodiment, realize high level " 1 " voltage modulated output；Instantly
When row voltage modulation signal is level "0", bus voltage is pulled to unidirectionally by the load between two lines bus BUSL1 and BUSL2
Conductive devices DM1Conducting and by two lines bus clamper in approximate VLOn level.Certainly the circuit being made of triode Q11, Q9 etc. can be with
The speed by " 1 " change " 0 " process is helped, realizes the application under higher frequency.
In Fig. 4 main website machine [M], capacitor CM1、RM1The differential circuit of composition, capacitor CM2、RM2The differential circuit of composition, compares
Amplifier AM1、AM2, adjustable bias power supply VM1、VM2, and sampling inductance LM1The utility model main website machine [M] is constructed jointly
Current modulated demodulates embodiment circuit.When [S] sends ascending current modulated square wave signal, in inductance LM1, capacitor
CM1, resistance RM1Under the action of, a differential signal is generated, comparison amplifier A is added inM1Input terminal, and bias voltage VM1It is added in
On another input pin of comparison amplifier, biasing is compared in generation, is equivalent to and entire sample information added a biased electrical
Pressure also includes rising edge in differential signal although at this moment both including failing edge, and only rising edge can be known as useful signal
Output, because of state of other signals all in the output of a no signal under the action of bias voltage.In this embodiment of Fig. 2
In, comparison amplifier AM2By VM2Produce a negative voltage bias, comparison amplifier AM2It can verify ascending current source signal
Failing edge；Comparison amplifier AM1By VM1Produce a negative bias, comparison amplifier AM1It can verify that ascending current is modulated
The rising edge of signal.Ascending current signal can be demodulated by the judgement and processing of micro-processor interface circuit unit [1] in [M].
Payload size between two lines bus BUSL1 and BUSL2 will affect input comparison amplifier AM1And AM2Detection sensitivity.When
When two lines bus load is very heavy, useful signal and interference signal can all reduce；And when loading very light, useful signal and interference signal are all
It can be very strong.Such as in different loads with identical bias voltage, then, in load weight, suitable bias voltage, light in load
When may be influenced to demodulate by wide edge, it is also possible to disturbed signal interference and mistuning solution.The utility model is using automatic
Adjust bias voltage VM1And VM2Invention.
For the demodulation for guaranteeing current signal edge, one embodiment of the utility model, it is characterized in that in sampling inductance LM1
Both ends are parallel with a capacitor CM, guarantee there is a best resonance when ascending current signal rising edge and failing edge occur
Point, and the resonance promise rising edge signal and failing edge signal have optimal width and amplitude.
In Fig. 2 slave station machine [S], diode DS2、DS3、DS4、DS5It is a reality for constituting the nonpolarity job design of slave station machine
Example is applied, the resistance R being connected in two lines busS1、RS2It is protective resistance, DS1It is an over-voltage protection element, to eliminate over-voltage arteries and veins
Punching harm.In Fig. 2 slave station machine [S], diode DS6, inductance LS1, resistance RS3, filter capacitor CS1, voltage-stabilizing device US1And filtered electrical
Container CS2Constitute a slave station electromechanical source supply embodiment.This described embodiment provides pressure stabilizing to the unit [6] in slave station machine
Power supply.Since the voltage of two lines bus circuit can achieve the high voltage of 20V to 50V, voltage-stabilizing device US1On pressure drop it is very big, device
Power consumption tolerance will limit the maximum output current of regulated power supply.One embodiment of the utility model is in voltage-stabilizing device US1It is defeated
Enter between end and the external pin of output end and meets a by-pass flow resistance RS, resistance value and power margin are to guarantee voltage-stabilizing device US1
The supply of minimum working current when maximum input voltage, at this moment, in US1When inputting maximum voltage, the output electric current of voltage-stablizer is practical
On be to be provided by non-essential resistance Rs, and work as US1When input voltage reduces, although by US1The electric current of offer will increase, but US1On
Pressure drop between outputting and inputting reduces, and power consumption increases limited.Diode DS7, inductance LS2, resistance RS4, filter capacitor CS3It constitutes another
One slave station electromechanical source supplies embodiment, this power supply is all provided by external component, therefore output power tolerance limits
It is small, larger current supply may be implemented.
In Fig. 2 slave station machine [S], the diode D of one embodimentS6With inductance LS1, another embodiment diode DS7With
Inductance LS2It is all the feature member of the utility model.In the two lines bus system of the utility model, two lines bus (BUSL1 and
BUSL2) power supply is not only provided, but also carry the communication information.The downlink of slave station machine [S] is sent to by main website machine [M] among these
During voltage modulated information realization, since main website machine [M] quantity is few, the limitation in terms of cost, volume is small, allows to design powerful
Power source realize, in the presence of can have capacitor between two lines bus and have big load, it is substantially undistorted to complete signal
In the case of transmit.But for more to quantity, widespread slave station machine [S], power consumption is high, piece volumes are big and product cost is high
It is all difficult to receive.Therefore, the embodiment of the ascending current modulation of slave station machine, is the electric current using 10mA~50mA, to adjust
Ascending current modulated signal processed.If there is no the diode D in circuitS6, inductance LS1, or there is no diode DS7, inductance
LS2, then:
First, it is stored in capacitor CS1、CS2、CS3Electricity will flow backward to two lines bus, influence the letter of two lines bus system completely
Breath transmission.
Second, the rising edge and failing edge of the current modulated using 10mA~50mA modulation will be by capacitors
CS1、CS3It filters, so that can not communicate completely.All power for being connected to filter capacitor of all slave station machines [S] of the utility model
Diode D is all connected to before power circuitSn(diode for indicating any position in the featured circuit) and inductance LSnIt (indicates
The inductance of any position in the featured circuit).Resistance RS3、 RS4It is current-limiting resistance, designs according to the design needs.This is practical
Novel feature element DSnAnd LSnAccess, it can be ensured that the completion of the utility model task:
Firstly, when sending downlink voltage modulation signal by main website machine [M], initial idle state and " 1 " signal condition
It is that the BUSL1 of two lines bus is to turn on VHHigh level, all power supplys of slave station machine, that is, capacitor CS1、CS2、 CS3Via diode DSn, electricity
Feel LSnIt is V in two lines bus in charged state, and after voltage modulation signal modulationLLow-signal levels when, all slave station machines
Diode DSnIt is in reverse state, not only ensure that the stabilization of slave station electromechanical source, also ensures the low function of voltage modulated process
Consumption, low distortion rate.
Diode DSnOne embodiment be using triode, field-effect tube and switching tube with unilateal conduction characteristic.
Secondly, when slave station machine [S] sends current modulated to main website machine [M], no matter the load between two lines bus have it is multiple,
It is much, as long as in Tthe utility model system, design has L described in the utility model between the total load and bus of all slave station machinesSn
(inductance for indicating any position in the featured circuit), there are inductance, current modulated rising edge and under
Drop edge can be in the L in main website machine [M]M1Upper generation rising edge and failing edge signal complete current signal demodulation.
Since one complete, useful signal has many known rules.One embodiment of the utility model, sufficiently benefit
It with the regularity of normal information, is designed, realizes comparison amplifier AM1、AM2Bias voltage adaptively adjust.
The utility model, which adaptively adjusts, to be realized by following inventions:
A, when two lines bus being allowed to be in idle, the utility model bus is in level"1" state.When there is an effective electric current
When modulated signal reaches main website machine [M], always first there are a failing edge pulse signal, yet another rising edge signal；If gone out
Now continuous multiple failing edge signals centainly show the comparison amplifier A for generating failing edge signalM2Bias voltage it is small, cause
Disturbing pulse output.The utility model can constantly monitor the order that INT1 and INT2 occurs, and failing edge pulse signal continuously occur
When, MCU can issue the numerical value that instruction increases DA1, from increase AM2Bias voltage value when, realize automatic adapt to.Occur when continuous
When rising edge pulse signal, MCU can issue the numerical value that instruction improves DA1, increase AM1Bias voltage value, realize adaptive.
B, the communication baud rate of the two lines bus system, can inform MCU.After communication baud rate known to MCU, if
It was found that the interval of failing edge and rising edge is less than baud rate, illustrate that biased electrical is forced down, the utility model can be by software according under
The problem of drop is along still rising edge, specific aim improves the numerical value of DA1 or DA2, to adaptively adjust the biasing of comparison amplifier.
The main website machine device at least exports DA1 and DA2 by the two-way digital voltage of MCU control, it is characterized in that:
A, comparison amplifier AM2、AM1Have by the bias voltage V of DA1 and DA2 controlM2And VM1；
B, digital voltage DA1 and the DA2 output of automatic adjustment are to add to triode Q13, Q14 base stage, by changing three poles
Pipe base voltage changes collector current in turn, then generates adjustable comparison amplifier biased electrical compacting by the collector current
Existing.
One embodiment of the utility model, triode are that the field-effect tube with similar functions is selected to realize.By
In the switching function circuit that base resistance and triode are constituted, one embodiment is that the device that selection is built in triode is realized
's.Circuit is integrated in an integrated circuit by one embodiment of the utility model after field-effect tube is transformed.
In the present invention, comparison amplifier AM1、AM2Acquisition is inductance LM1On ascending current modulated signal, partially
Voltage is set also with inductance LM1The level at place is reference level, and comparison amplifier works in the one state of two lines bus free time,
BUSL1 level is close to VH, this makes the incoming level of comparison amplifier work in VHNear.The utility model is to solve this
Problem, one embodiment, comparison amplifier AM1、AM2Power supply connect respectively in VLWith than VHOn the power supply of high V0, one is reduced
The working power voltage of comparison amplifier puts device work in amplification region secondly ensure that and compare.One embodiment, V0 be 2V~
The brute supply of 10V.In the present embodiment, comparison amplifier selects open-drain output device.One embodiment comparison amplifier
2903 dual comparators for having selected open-drain output complete A with a deviceM1And AM2Task.In the utility model embodiment
In, MCU is GND with reference to ground, and the reference of comparison amplifier ground is VL, it is on different reference levels, the utility model is implemented
Example carries out level conversion by triode Q4, Q6, resistance R9, R11, R15, R12 all the way；Another way passes through triode Q5, Q7,
Resistance R10, R13, R16, R14 carry out level conversion.Another embodiment of the utility model is met the requirements special using pressure resistance
With level conversion integrated circuit.
Fig. 5 is one embodiment of equivalent switch KM1.MCU is the component part of micro process electronic unit [1] in figure.?
[M] send downlink voltage modulation signal during, by MCU output I/O pin P03, P04 (it refer to design in specific I/O port, and
The pin in specific chip is not represented) high level is set, it is connected by resistance R34, R33 to triode Q31 all the way, then passes through electricity
The triode Q30 that resistance R31, R30 driving emitter is connect with VH, then by resistance R32, R35, drive NPN type pliotron
Q32 and current-limiting resistance R36 realizes sampling inductance LM1Short circuit making in one direction；Another way by resistance R39, R41,
Triode Q34, resistance R38, R37 drive positive-negative-positive pliotron Q33 and current-limiting resistance R40, realize sampling inductance LM1One
Short circuit making on a direction.
The effect of invention
It is a kind of to provide power supply simultaneously and the main website machine device that is communicated using two lines bus, by by downlink signal tune
The voltage modulation signal for modulating section and low pressure guarantee power supply section building by high-voltage signal is made, realizes that main website machine device passes through
Two lines bus completes the communication with a slave station group of planes and provides the invention task of power supply to from a group of planes, is switched by main website machine equivalent electrons
Circuit realizes the modulation of high-power downlink voltage signal；By receiving the sampling element inductance L minimum using D.C. resistanceM1,
Ascending current modulated signal using by differential circuit decomposite come rising edge and failing edge be compared and enlarged after sentenced with software
Do not demodulate, realize high-power, heavy load, at a distance under communication, complete the task of the utility model.The utility model only needs
Two conducting wires can not only communicate but also provide power supply, and traffic rate is high, distance is remote, can be widely used for the Internet of things system for allowing to be routed
In.
Claims (5)
1. a kind of main website machine device for providing power supply simultaneously using two lines bus and being communicated, at least reception slave station electromechanics stream tune
The inductance L of signal processedM1, have the equivalent electrons switch unit K switched over according to descending communication signal to be modulatedM2, feature
It is:
A, main website machine [M] downlink voltage modulation signal is the high voltage section by modulation downlink communication information and ensures that slave station machine supplies
What the low-voltage section of electricity was constituted；
B, main website machine [M] ascending current signal receiving circuit has the sampling electricity for being serially connected in two lines bus BUSL1 and voltage modulation circuit
Feel LM1；
C, main website machine [M] ascending current signal receiving circuit has capacitor CM1, resistance RM1With capacitor CM2, resistance RM2The differential of composition
Current impulse has the comparison amplifier A of acquisition ascending current modulated signal failing edge and rising edge along circuit is receivedM2And AM1；
D, the comparison amplifier A of ascending current modulated signal failing edge and rising edge is acquiredM2And AM1Having can be by micro-processor interface circuit
The bias voltage V of unit [1] controlM1And VM2。
2. the main website machine device for providing power supply simultaneously using two lines bus according to claim 1 and being communicated, is at least adopted
Sample inductance LM1, unilateal conduction device DM1, it is characterized in that:
A, when in two lines bus BUSL1 by equivalent electrons switch unit KM2Disconnection and VHConnection after, two lines bus level "0" is by two
Pole pipe DM1Pull down what power supply was realized in two lines bus load；
B, during main website machine [M] downlink voltage modulation signal is sent, equivalent electrons switch KM1Inductance L will be sampledM1Equivalent short circuit.
3. provide power supply and the main website machine device that is communicated simultaneously using two lines bus according to claim 1, at least by
The two-way digital voltage of MCU control exports DA1 and DA2, it is characterized in that:
A, comparison amplifier AM2、AM1Have by the bias voltage V of DA1 and DA2 controlM2And VM1；
B, digital voltage DA1 and the DA2 output of automatic adjustment are to add to triode Q13, Q14 base stage, by changing triode base
Pole tension changes collector current in turn, then generates adjustable comparison amplifier bias voltage by the collector current and realize
's.
4. according to claim 1 using voltage modulated in the main website machine device that two lines bus provides power supply simultaneously and is communicated
In level "0" voltage generation circuit, at least one limiting circuit being made of resistance R17 and triode Q8, it is characterized in that:
A, triode Q8 is a PNP type triode, transistor base by resistance R17 directly and VLIt is connected；
B, the emitter of triode Q8 connects on the supply line of two lines bus BUSL1 by a nonessential diode, triode Q8
Collector be supplied to discharge circuit use.
5. according to claim 1 using in the main website machine device voltage modulated that two lines bus provides power supply simultaneously and is communicated
Level"1" voltage generation circuit, at least one drive source circuit being made of triode Q3, it is characterized in that:
A, driving triode Q3 collector is to be connect by current-limiting resistance R5 than VHOn low 2V~5V voltage source；
B, the emitter of pliotron Q1, Q2 is connected to the identical flows resistance of resistance value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820036159.2U CN208239974U (en) | 2018-01-10 | 2018-01-10 | The main website machine device for providing power supply simultaneously using two lines bus and being communicated |
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|---|---|---|---|
| CN201820036159.2U CN208239974U (en) | 2018-01-10 | 2018-01-10 | The main website machine device for providing power supply simultaneously using two lines bus and being communicated |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109639366A (en) * | 2019-01-31 | 2019-04-16 | 华夏世昌(北京)科技有限公司 | Signal pulsewidth modulation and demodulation method based on dual-wire bus communication |
| CN110311845A (en) * | 2019-07-27 | 2019-10-08 | 深圳市骏普科技开发有限公司 | A kind of bus-powered method of battery-operated type M-BUS |
| CN112202573A (en) * | 2020-09-30 | 2021-01-08 | 金华飞光科技有限公司 | Two-wire system power supply and networking communication system |
-
2018
- 2018-01-10 CN CN201820036159.2U patent/CN208239974U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109639366A (en) * | 2019-01-31 | 2019-04-16 | 华夏世昌(北京)科技有限公司 | Signal pulsewidth modulation and demodulation method based on dual-wire bus communication |
| CN110311845A (en) * | 2019-07-27 | 2019-10-08 | 深圳市骏普科技开发有限公司 | A kind of bus-powered method of battery-operated type M-BUS |
| CN110311845B (en) * | 2019-07-27 | 2021-10-08 | 深圳市骏普科技开发有限公司 | Battery-powered M-BUS (Meter-BUS) BUS power supply method |
| CN112202573A (en) * | 2020-09-30 | 2021-01-08 | 金华飞光科技有限公司 | Two-wire system power supply and networking communication system |
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