CN103904743B - A kind of parasitic method of supplying power to and structure thereof - Google Patents
A kind of parasitic method of supplying power to and structure thereof Download PDFInfo
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- CN103904743B CN103904743B CN201410123946.7A CN201410123946A CN103904743B CN 103904743 B CN103904743 B CN 103904743B CN 201410123946 A CN201410123946 A CN 201410123946A CN 103904743 B CN103904743 B CN 103904743B
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- 230000003071 parasitic effect Effects 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000006854 communication Effects 0.000 claims abstract description 57
- 238000004891 communication Methods 0.000 claims abstract description 56
- 239000003990 capacitor Substances 0.000 claims abstract description 42
- 230000001052 transient effect Effects 0.000 claims description 14
- 244000045947 parasite Species 0.000 claims description 12
- 230000024241 parasitism Effects 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 5
- 238000004146 energy storage Methods 0.000 claims description 2
- 238000007688 edging Methods 0.000 claims 1
- 239000004065 semiconductor Substances 0.000 description 17
- 238000010586 diagram Methods 0.000 description 7
- 101150058910 RDS1 gene Proteins 0.000 description 2
- 101100219167 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) BUL1 gene Proteins 0.000 description 2
- 101100140267 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) RDS2 gene Proteins 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Abstract
The present invention relates to a kind of parasitic method of supplying power to and structure thereof, including controlled pull-up module and parasitic supply module；Controlled pull-up module is made up of monostable circuit, strong pull-up switching tube and weak pull-up resistor；Parasitic supply module is made up of rectifier switch pipe and storage capacitor；The communication data line between master-slave equipment is utilized to be powered from equipment；Controlled pull-up module is adjusted strong and weak pull-up state automatically by communication data line Automatic level control, for the storage capacitor charging in parasitic supply module.The present invention can be by data wire for power from equipment, simplified system, reduces system cost；Only need to connect controlled pull-up module and parasitic two parts of supply module respectively the both sides of master and slave equipment, it is not necessary to the software and hardware of communicating pair is carried out any amendment and adjustment.
Description
Technical field
The present invention relates to parasitic for electrical domain, a kind of communication data line pair utilized between master-slave equipment
The parasitic method of supplying power to being powered from equipment and structure thereof.
Background technology
Parasitic power supply is a kind of side by the communication data line between master-slave equipment to being powered from equipment
Formula, i.e. on a wire, also carries out the transmission of power supply while carrying out data signal transmission, it often occurs
In serial communication.When system uses parasitism power supply, directly obtain power supply from data wire from equipment, therefore
From equipment without extra local power supply configuration, decrease from equipment peripheral components, thus reduce system
This.Common parasitic method of supplying power to power supply capacity is limited, is only provided that the load current of uA magnitude, as
1-WIRE agreement is defined as each electric current providing 5uA from equipment by parasitic power supply mode work, and
The improved method that Patent No. " 201220682365.3 " proposes cannot be carried out data when there is again parasitic power supply
The defect of communication, therefore, at the aspect such as monitoring and signals collecting in real time, parasitic power supply does not obtains widely should
With.
Summary of the invention
The technical problem to be solved in the present invention is: propose a kind of simple in construction, it is not necessary to extra local power supply is joined
Put and just can carry out the collection of data signal and the parasitic method of supplying power to of power supply and structure thereof simultaneously.
The technical solution adopted in the present invention is: a kind of parasitic method of supplying power to, comprises the following steps:
1) main equipment transceiver and between device transceiver connecting communication data wire；
2) connect controlled pull-up module in main equipment transceiver end, connect parasitism power supply from device transceiver end
Module；
3) controlled pull-up module by the signal level on communication data line control to automatically select strong pull-up or weak on
Pull-up resistor, charges to the storage capacitor of parasitic supply module and then is powered from equipment.
Specifically, step 2 of the present invention) in controlled pull-up module include monostable circuit, Qiang Shang
Drag switch pipe and weak pull-up resistor；The input of described monostable circuit is connected with communication data line, single
The outfan of steady-state circuit is extremely connected with the control of strong pull-up switching tube, the other two ends of strong pull-up switching tube with
The two ends of weak pull-up resistor are in parallel, and the one end after parallel connection is connected with the power supply of main equipment, and the other end connects communication
Data wire；Described parasitic supply module includes rectifier switch pipe and storage capacitor；Described rectifier switch
The control pole of pipe connects communication data line, and the end in the other two ends of rectifier switch pipe is connected to communication data line,
Other end is connected with one end of storage capacitor and draws parasite power from this end；Another termination of storage capacitor
Ground.
Step 3 of the present invention) in by the communication data line method to powering from equipment be:
When communication data line is idle high level, monostable circuit output low level, close strong pull-up switch
Pipe, controlled pull-up module selects weak pull-up resistor, by the rectification in weak pull-up resistor and parasitic supply module
Switching tube is storage capacitor charging, and the parasite power that storage capacitor produces is the power supply basic from equipment offer；
When the signal on communication data line changes to high level from low level, monostable circuit will export transient state,
In the period of its output transient state, strong pull-up switching tube will turn on, and communication data line will be connected with main power source and be
Power from equipment；
When communication data line output high level state, the rectifier switch pipe controlled in parasitic supply module is led
Logical, charge rapidly for storage capacitor；The parasite power that storage capacitor produces is for power from equipment.
The transmitter causing master-slave equipment in order to avoid being in strong pull-up state for a long time because of circuit cannot drag down always
Line level causes communication data mistake, and monostable circuit of the present invention is by the rising edge on communication data line
Along triggering the strong pull-up state by strong pull-up state limit within a certain period of time of automatic control circuit, both realized
Parasitic power supply does not the most affect the communication data of both sides.
Reliable for ensureing communication data, the transient state time of monostable circuit of the present invention output less than main,
The shortest data pulse width is transmitted between equipment；Described pulse width depends on the data of intercommunication
Bit rate.If the data bit-rate of intercommunication is S, the transient state time of monostable circuit output is tp, it is considered to
There is RC parameter in error and monostable circuit to both sides' communication baud rate and there is discreteness, tp should meet with
Lower relational expression:
Meanwhile, present invention also offers a kind of parasitic electric power-feeding structure, including master and slave device transceiver and company
Connect the communication data line of master and slave device transceiver；Described main equipment transceiver end arranges controlled pull-up module
And main power source；Described arranges parasitic supply module from device transceiver end；Described controlled pull-up module
Control to automatically select strong pull-up or weak pull-up resistor by the signal level on communication data line, parasitism is powered
The storage capacitor of module charges and then is powered from equipment.Monostable circuit of the present invention is differential
Type monostable circuit；If Vu is main power voltage, K is relative to master from the minimum supply voltage of equipment permission
The coefficient of supply voltage, RDS1 is the conducting resistance of strong pull-up switching tube, and RDS2 is leading of rectifier switch pipe
Energising resistance, I is parasitic power supply load current.Then load current I meets relationship below:
Strong pull-up switch of the present invention and rectifier switch pipe utilize the low on-resistance characteristic of switch metal-oxide-semiconductor, energy
Bigger load current is provided.
The present invention only need to connect controlled pull-up module and parasitic supply module two the both sides of master and slave equipment respectively
Individual part, it is not necessary to the software and hardware of communicating pair is carried out any amendment and adjustment.
The invention has the beneficial effects as follows: 1, when system uses parasitism power supply, directly obtain from data wire from equipment
Power taking source, it is not necessary to from main equipment extracting power supply cord or configure extra local power supply, decreases from equipment peripheral
Device, reduces the volume from equipment, reduces system cost, also facilitates system to expand at complex condition
Exhibition；2, the present invention utilizes the characteristic of low on-resistance of MOS switch pipe so that can use in circuit
The storage capacitor of larger capacity also carries out quick charge to it, and load current is up to mA magnitude, for from equipment
Provide the high-performance parasite power that load capacity is big, ripple is little；3, the monostable circuit in the present invention uses
RC derivative-type monostable circuit, simple in construction, eliminate loaded down with trivial details calculating, convenient debugging.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the structured flowchart of the present invention；
Fig. 2 is the controlled pull-up resistor module fundamental diagram of the present invention；
Fig. 3 is the derivative-type monostable circuit schematic diagram of the present invention；
Fig. 4 is the parasitic supply module fundamental diagram of the present invention；
Fig. 5 (a)～(d) are the main circuit operation principle waveform diagram of the present invention；
In figure: 1, controlled pull-up module；2, parasitic supply module；11, monostable circuit；12, Qiang Shang
Draw MOS switch pipe；13, weak pull-up resistor；21, rectification MOS switch pipe；22, storage capacitor.
Detailed description of the invention
Presently in connection with accompanying drawing and preferred embodiment, the present invention is further detailed explanation.These accompanying drawings are
The schematic diagram simplified, illustrates the basic structure of the present invention the most in a schematic way, and therefore it only shows and the present invention
Relevant composition.
As it is shown in figure 1, the framework of a kind of parasitic method of supplying power to, including controlled pull-up module 1 and parasitic power supply
Module 2 two parts.Wherein: controlled pull-up module 1 include monostable circuit 11, strong pull-up switching tube 12 with
And weak pull-up resistor 13；Parasite power module includes rectifier switch pipe 21 and storage capacitor 22；On controlled
Drawing-die block is controlled to automatically select strong pull-up or weak pull-up resistor, to parasitism by the signal level on communication data line
The storage capacitor charging of supply module, thus produce parasite power and be powered from equipment.
Controlled pull-up module operation principle is as shown in Figure 2: controlled pull-up module 1 comprise monostable circuit 11,
Strong pull-up switching tube 12 and weak pull-up resistor 13, wherein: the input of monostable circuit 11 and the number that communicates
Being connected according to line, the outfan of monostable circuit 11 is extremely connected with the control of strong pull-up switching tube 12, strong pull-up
The other two ends of switching tube 12 are in parallel with the two ends of weak pull-up resistor 13, and one end is connected with the power supply of main equipment,
The other end receives communication data line.
In the present embodiment, monostable circuit uses derivative-type monostable circuit.Its schematic diagram is as shown in Figure 3.
When communication data line does not has level to change, it is 0 that monostable circuit defeated 11 goes out, now strong pull-up metal-oxide-semiconductor
12 are connected with main power source by weak pull-up resistor 13 by, communication data line.
When on communication data line, level changes to 1 from 0, monostable circuit 11 will export transient state, monostable
During state circuit 11 exports transient state, when its output voltage exceedes the threshold voltage of strong pull-up metal-oxide-semiconductor 12, by force
Pull-up metal-oxide-semiconductor 12 will turn on, and now communication data line is strong pull-up state, by strong pull-up metal-oxide-semiconductor
12 are connected with main power source.In the present embodiment, strong pull-up switching tube selects low conduction impedance metal-oxide-semiconductor, to reach
To the quick charge effect of storage capacitor 22 and reduce supply voltage loss.
Parasitic supply module operation principle is as shown in Figure 4: parasitic supply module 2 comprises rectifier switch pipe 21 He
Storage capacitor 22, wherein: in parasitic supply module, the control pole of rectifier switch pipe 21 is connected to communication data line,
An end in the other two ends of rectifier switch pipe 21 is connected to communication data line, other end and storage capacitor 22
One end be connected and from this end draw parasite power；The other end ground connection of storage capacitor 22.In the present embodiment,
Rectifier switch pipe 21 uses low conduction impedance metal-oxide-semiconductor, can be substantially reduced the impedance of charge circuit, reduces
Voltage loss, improves the charge efficiency to storage capacitor 22.
Main circuit operation principle waveform diagram of the present invention is as shown in Figure 5:
Wherein, U1 be communication data line voltage, U2 be derivative-type monostable circuit 11 output voltage, U3
For the voltage that strong pull-up metal-oxide-semiconductor 12 output voltage, U4 are storage capacitor 22 two ends.As shown in U1 in figure,
Within the t1-t2 time period, when the level on communication data line uprises, monostable circuit 11 will export transient state,
Its waveform is as shown in U2.In the period of monostable circuit output transient state, if its output voltage is more than strong pull-up
The threshold voltage of metal-oxide-semiconductor 12, strong pull-up metal-oxide-semiconductor 12 is by saturation conduction certain time, and its oscillogram is such as
Shown in U3.Owing to this example uses simple RC derivative-type monostable circuit, it is not necessary to use complicated monostable
Circuit.When, after strong pull-up metal-oxide-semiconductor 12 saturation conduction, main power source passes through strong pull-up metal-oxide-semiconductor 12 and rectification
Storage capacitor 22 is charged by metal-oxide-semiconductor 21, and the voltage at storage capacitor two ends is as shown in U4.Due to metal-oxide-semiconductor
Conduction impedance fall is the lowest, therefore, when controlled pull-up module 1 is in strong pull-up state, and can be to energy storage electricity
Hold 22 and carry out short time quick charge and electric energy supplement, also ensure that the stability of signal of communication simultaneously, will not
Because causing pulse distortion to disturb the data communication between master-slave equipment to capacitor charging time is long.Additionally,
So that have enough electric energy to carry out non-stop run from equipment, then need according to communication protocol and from equipment
Load select suitable storage capacitor.
A kind of method analyzing circuit parameter of the present invention set forth below:
Assume that circuit is operated in normal condition, and as a example by 10 common UART communications, limiting case is
Start bit is that 0,8 data bit are all 0, and stopping position is 1, without check bit, according to the design of the present invention
Scheme, storage capacitor 22 only just can carry out quick charge when stopping position occurring.If it is fair to power from equipment
The ripple factor permitted is 10%, and the most with this understanding, circuit is wanted normally to work, and answers following points to set up:
Transient state pulse width tp of monostable circuit output must be little equal to the transmission of a data in communication process
Time, it is contemplated that both sides' communication baud rate exists RC parameter in error and monostable circuit and there is discreteness,
Rule of thumb formula, is ensureing that communication data should make following formula set up on the premise of reliable:
Storage capacitor 22 the most only allows electric discharge 10% in two time intervals stopping position, and discharge characteristics is
Constant-current discharge, and during of short duration strong pull-up state after stopping position and occurring, quick charge supplements loss
Electricity.
Incorporated experience into parameter by conditions above and can tentatively obtain following equalities:
Wherein, S is communication baud rate；I is load current；Vu is main power voltage；K permits from equipment for setting
The minimum supply voltage permitted is relative to the coefficient of main power voltage；C2 is storage capacitor；RDS1 is strong pull-up
The conducting resistance of metal-oxide-semiconductor；RDS2 is the conducting resistance of rectification metal-oxide-semiconductor；VGS is strong pull-up metal-oxide-semiconductor
Threshold voltage；C2 is storage capacitor；Resistance that R2 and C1 is respectively in monostable circuit and electric capacity.
It is clear that have benefited from controlled pull-up module 1 and the design of parasitic supply module 2, controlled
At pull-up module, 1 when strong pull-up state, it is possible to achieve carry out storage capacitor 22 in parasitic supply module 2
Low-impedance quick charge, the value of storage capacitor 22 can suitably increase, to improve the load of parasite power
Ability, and reduce the ripple factor of power supply.Therefore, the present invention program is provided that a kind of high-performance parasitism is powered
Power supply.
The detailed description of the invention of the simply present invention described in description above, various illustrations are not to this
Bright flesh and blood is construed as limiting, and person of an ordinary skill in the technical field is permissible after having read description
The most described detailed description of the invention is made an amendment or deformed, without departing from the spirit and scope of invention.
Claims (6)
1. a parasitic method of supplying power to, it is characterised in that comprise the following steps:
1) main equipment transceiver and between device transceiver connecting communication data wire；
2) connect controlled pull-up module in main equipment transceiver end, connect parasitism power supply from device transceiver end
Module；
3) controlled pull-up module by the signal level on communication data line control to automatically select strong pull-up or weak on
Pull-up resistor, charges to the storage capacitor of parasitic supply module and then is powered from equipment；
Described step 2) in controlled pull-up module include monostable circuit, strong pull-up switching tube and weak on
Pull-up resistor；The input of described monostable circuit is connected with communication data line, the outfan of monostable circuit
Control with strong pull-up switching tube is extremely connected, the other two ends of strong pull-up switching tube and the two ends of weak pull-up resistor
Parallel connection, the one end after parallel connection is connected with the power supply of main equipment, and the other end connects communication data line；Described posts
Raw supply module includes rectifier switch pipe and storage capacitor；The control pole of described rectifier switch pipe connects logical
Letter data line, the end in the other two ends of rectifier switch pipe is connected to communication data line, other end and energy storage
One end of electric capacity is connected and draws parasite power from this end；The other end ground connection of storage capacitor.
2. a kind of parasitic method of supplying power to as claimed in claim 1, it is characterised in that: described step 3)
In by the communication data line method to powering from equipment be:
When communication data line is idle high level, monostable circuit output low level, close strong pull-up switch
Pipe, controlled pull-up module selects weak pull-up resistor, by the rectification in weak pull-up resistor and parasitic supply module
Switching tube is storage capacitor charging, and the parasite power that storage capacitor produces is the power supply basic from equipment offer；
When the signal on communication data line changes to high level from low level, monostable circuit will export transient state,
In the period of its output transient state, strong pull-up switching tube will turn on, and communication data line will be connected with main power source and be
Power from equipment；
When communication data line output high level state, the rectifier switch pipe controlled in parasitic supply module is led
Logical, charge rapidly for storage capacitor；The parasite power that storage capacitor produces is for power from equipment.
3. a kind of parasitic method of supplying power to as claimed in claim 1, it is characterised in that: described monostable electricity
On route communication data wire rise edging trigger automatic control circuit strong pull-up state and by strong pull-up state
Limit within a certain period of time；The described time depends on the transient state time that monostable exports.
4. a kind of parasitic method of supplying power to as claimed in claim 2, it is characterised in that: described monostable electricity
The transient state time of road output transmits the shortest data pulse width less than between master and slave equipment；Described pulse
Width depends on the data bit-rate S of intercommunication；Transient state time tp of described monostable circuit output is:
0.8/S≤tp ＜ 1/S.
5. a parasitic electric power-feeding structure, it is characterised in that: include master and slave device transceiver and connect main,
From the communication data line of device transceiver；Described main equipment transceiver end arranges controlled pull-up module and master
Power supply；Described arranges parasitic supply module from device transceiver end；Described controlled pull-up module is by logical
Signal level on news data wire controls to automatically select strong pull-up or weak pull-up resistor, to parasitic supply module
Storage capacitor charges and then is powered from equipment；Described controlled pull-up module include monostable circuit,
Strong pull-up switching tube and weak pull-up resistor；The input of described monostable circuit is connected with communication data line,
The outfan of monostable circuit is extremely connected with the control of strong pull-up switching tube, the other two ends of strong pull-up switching tube
In parallel with the two ends of weak pull-up resistor, the one end after parallel connection is connected with the power supply of main equipment, and the other end connects logical
Letter data line；Described parasitic supply module includes rectifier switch pipe and storage capacitor；Described rectification is opened
The control pole closing pipe connects communication data line, and the end in the other two ends of rectifier switch pipe is connected to communication data
Line, other end is connected with one end of storage capacitor and draws parasite power from this end；Another of storage capacitor
End ground connection.
6. a kind of parasitic electric power-feeding structure as claimed in claim 5, it is characterised in that: described monostable electricity
Road is derivative-type monostable circuit.
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| CN201410123946.7A CN103904743B (en) | 2014-03-28 | 2014-03-28 | A kind of parasitic method of supplying power to and structure thereof |
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| CN201410123946.7A CN103904743B (en) | 2014-03-28 | 2014-03-28 | A kind of parasitic method of supplying power to and structure thereof |
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| CN107196770B (en) * | 2017-07-28 | 2020-08-04 | 深圳市瑞艾特科技有限公司 | System for supplying power through signal wire |
| CN109857010B (en) * | 2018-12-24 | 2022-03-18 | 惠州市蓝微电子有限公司 | Control method for realizing real-time power supply and bidirectional communication by double lines |
| CN111654076B (en) * | 2020-05-27 | 2021-07-13 | 中国科学院微电子研究所 | Multi-channel power supply parasitic power supply and communication system |
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| CN103683526A (en) * | 2012-09-12 | 2014-03-26 | Vega格里沙贝两合公司 | Energy supply system for a field device with a wireless module |
| CN203850863U (en) * | 2014-03-28 | 2014-09-24 | 常州信息职业技术学院 | High-performance parasitic power supply structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012077165A1 (en) * | 2010-12-08 | 2012-06-14 | パナソニック株式会社 | Power supply circuit, power supply method and power supply system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683526A (en) * | 2012-09-12 | 2014-03-26 | Vega格里沙贝两合公司 | Energy supply system for a field device with a wireless module |
| CN203850863U (en) * | 2014-03-28 | 2014-09-24 | 常州信息职业技术学院 | High-performance parasitic power supply structure |
Non-Patent Citations (1)
| Title |
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| 一种改进的寄生供电串行通信总线及其收发器;王俊松等;《微电子学》;20071231;第37卷(第6期);第882-886页 * |
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