CN205693430U - A kind of acquisition terminal double-power supply switching device - Google Patents
A kind of acquisition terminal double-power supply switching device Download PDFInfo
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- CN205693430U CN205693430U CN201520860640.XU CN201520860640U CN205693430U CN 205693430 U CN205693430 U CN 205693430U CN 201520860640 U CN201520860640 U CN 201520860640U CN 205693430 U CN205693430 U CN 205693430U
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Abstract
The utility model discloses a kind of acquisition terminal double-power supply switching device and include housing, the back side of housing is provided with rail plate, and the front of housing is provided with binding post, display interface and control knob.Built-in main power supply voltage detecting circuit, auxiliary power supply source voltage detecting circuit, main power supply change-over circuit, auxiliary power supply source change-over circuit, microprocessor control circuit, microprocessor power supply circuit, main power supply and auxiliary power supply source switching selecting circuit in housing.This utility model has the advantage that this utility model one acquisition terminal dual power supply control switching circuit compared to existing technology, embedded micro-processor control circuit, monitoring main power supply and the voltage signal of auxiliary power supply source in real time, send control signal in real time, it is achieved main power supply and the automatic switchover of auxiliary power supply source.In the case of external power source has electricity but lacks a phase, a kind of acquisition terminal dual power supply control switching circuit of the present utility model ensures the normal working power of acquisition terminal, it is to avoid the terminal that non-faulting reason causes is stopped transport.
Description
Technical field
This utility model relates to a kind of acquisition terminal power transfer device, particularly relates to a kind of acquisition terminal dual power supply switching
Device.
Background technology
State Grid Corporation of China is carrying forward vigorously electricity consumption and is gathering the construction of information system, it is proposed that " all standing, full collection,
Full pre-payment " construction object.Acquisition terminal is the important component part of power information acquisition system, for user is carried out electricity
Amount gathers monitoring in real time.Acquisition terminal is generally mounted in user's power distribution room (case).Its power supply use adaptive mode, according to
The difference of family metering method is divided into three-phase and four-line and phase three-wire three two kinds.In working at the scene, the work electricity of phase three-wire three terminal
Source is taken from user and is measured PT, and voltage range is 3 × 100V.At present, double (many) power supplys in the range of the electric company of Guo Wang Hefei supply
Electricity client reaches family more than 600, and along with the raising requiring power supply reliability, the customer quantity of the type may proceed to increase.Should
The puzzlement that power supply mode is brought to electricity consumption acquisition system is: existing acquisition terminal is to be connected on the user PT of a main power supply,
Client once carry out electrically operated terminal will dead electricity, client's normal electricity consumption there is but terminal situation about cannot gather.This just makes
Become collection data imperfect, gathered success rate and decline, with other sales service just badly influence system acquisition success rate
Normally opened exhibition.It is unsuccessful that this terminal caused because of client's normal operating cannot gather the collection that referred to as non-faulting reason causes.Existing
Some automatic power-supply switch are mostly used in low-voltage distribution system, set for factory, telecommunications, industry and civil building etc.
Meter manufactures, and its operation principle mainly carries out logical judgment by monitoring external power source signal and sends control signal and control low
Voltage breaker, motor-operating mechanism etc. realize the switching of external power source (civil power and civil power, civil power and electromotor).For just meeting
Often its switching of normal job demand of load is that three-phase switches simultaneously, is also to be controlled three-phase output.
Collection in worksite terminal supplying power switching device wants cube little, running voltage 100V, and power supply is switched by switching device
After be directly output to acquisition terminal.But, for acquisition system terminal, existing automatic power-supply switch is improper, existing
Some acquisition terminal power transfer device volumes are big, install numerous and diverse, and cost is high.Therefore urgently develop a kind of collection end meeting demand
End power transfer device.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of acquisition terminal double-power supply switching device, built-in micro-place
Reason device control circuit, can monitor main power supply and the voltage signal of auxiliary power supply source in real time, and according to practical situation, send control in real time
Signal processed, it is achieved main power supply and the automatic switchover of auxiliary power supply source.
In order to solve above-mentioned technical problem, this utility model adopts the following technical scheme that
A kind of acquisition terminal double-power supply switching device, including housing, the back side of described housing is provided with rail plate, described shell
The front of body is provided with binding post, display interface and control knob, built-in main power supply input circuit, main power supply in described housing
Source is inputted by main power supply input circuit, provides the input of 100V main power source for acquisition terminal dual power supply switching control；
Auxiliary power supply source input circuit, auxiliary power supply source is inputted by auxiliary power supply source input circuit, cuts for acquisition terminal dual power supply
Change control and the input of 100V auxiliary power supply source is provided；
Main power supply and auxiliary power supply source switching selecting circuit, described main power supply input circuit and auxiliary power supply source input circuit
Ground outfan all electrically connect with main power supply and auxiliary power supply source switching selecting circuit input, described main power supply input circuit with
Auxiliary power supply source input circuit selects out-put supply by main power supply and the switching of auxiliary power supply source switching selecting circuit；
Main power supply change-over circuit, main power supply is inputted by main power supply input circuit, main power supply input circuit
Outfan is electrically connected with the input of main power supply change-over circuit, and main power supply by main power supply change-over circuit blood pressure lowering is
10V power supply exports；
Auxiliary power supply source change-over circuit, auxiliary power supply source is inputted by auxiliary power supply source input circuit, auxiliary power supply source input circuit
Outfan is electrically connected with the input of auxiliary power supply source change-over circuit, and auxiliary power supply source is 9V by auxiliary power supply source change-over circuit blood pressure lowering
Power supply exports；
Microprocessor control circuit, the signal output part of microprocessor control circuit and main power supply and the switching of auxiliary power supply source
The signal input part of selection circuit is electrically connected with；The input of described microprocessor control circuit is examined with described main power supply voltage
Slowdown monitoring circuit electrically connects with the outfan of auxiliary power supply source voltage detecting circuit；
Microprocessor power supply circuit, the input of described main power supply change-over circuit and auxiliary power supply source change-over circuit is all with micro-
The input of Processor power supply is electrically connected with, the outfan of described microprocessor power supply circuit and microprocessor control circuit
Input electrical connection, described microprocessor power supply circuit accepts main power supply change-over circuit and auxiliary power supply source change-over circuit is defeated
Enter, and automatically select a road as power supply, and be 3.3V output by its blood pressure lowering；
Main power supply voltage detecting circuit, the input of main power supply voltage detecting circuit and main power supply input circuit
Outfan electrically connects, and the input of described main power supply voltage detecting circuit detection main power supply is the most normal, and is carried by signal
To microprocessor power supply circuit；
Auxiliary power supply source voltage detecting circuit, the input of auxiliary power supply source voltage detecting circuit and auxiliary power supply source input circuit
Outfan electrical connection, whether the input that described auxiliary power supply source voltage detecting circuit detects auxiliary power supply source normal and signal is defeated
Give microprocessor power supply circuit.
As the further optimization of such scheme, described main power supply change-over circuit includes the first input circuit, the first control
Circuit processed, the first compensation circuit, the first reduction voltage circuit and the first feedback circuit；Described first input circuit includes critesistor
RT1, RT3, RT4, commutation diode V1, V5, V19, V22, V40, V41, thermal resistor RT2, electric capacity C1；Described first controls
Circuit includes that controller, described controller are TOP232P controller；Described first compensates circuit includes resistance R15 and electric capacity C9；
Described first reduction voltage circuit includes transformator T1, Zener diode V4, V2, V7, electric capacity C3, C4, C6, C15；Described first feedback
Circuit includes optocoupler E3, resistance R10, R9, R11, diode V12, V11, Zener diode V10.
As the further optimization of such scheme, described auxiliary power supply source change-over circuit includes the second input circuit, the second control
Circuit processed, the second compensation circuit, the second reduction voltage circuit and the second feedback circuit；Described second input circuit includes critesistor
RT5, RT6, RT8, commutation diode V42, V43, V44, V45, V46, V47, thermal resistor RT6, electric capacity C17；Described second
Control circuit includes that controller, described controller are TOP232P controller；Described second compensates circuit includes resistance R24 and electricity
Hold C22；Described second reduction voltage circuit includes transformator T2, Zener diode V21, V20, V24, electric capacity C18, C19, C20, C21；
Described second feedback circuit includes optocoupler E6, resistance R22, R21, R23, diode V31, Zener diode V27.
As the further optimization of such scheme, described main power supply voltage detecting circuit include resistance R1, R2, R3, R5,
R6, R7, R8 and R30, voltage transformer CT1 and CT2, diode V2, V9, A phase input series resistance R1 of main power supply,
Being connected with voltage transformer CT1 after R2, R3, the B phase input of main power supply is all connected with voltage transformer CT1 and CT2, main confession
It is connected with voltage transformer CT2 after C phase input series resistance R5 of power supply, R6, R7, voltage transformer CT1 and resistance R30,
Diode V2 is in parallel, and voltage transformer CT2 and resistance R8, diode V9 are in parallel.
As the further optimization of such scheme, described microprocessor power supply circuit includes diode V13 and V16, three ends
Voltage stabilizing chip V14, electric capacity C14 and C11, electric capacity C15 and C12, main power supply change-over circuit input 10V power supply connects diode
V13, auxiliary power supply source change-over circuit input 9V power supply connects diode V14, then by input filter circuit, three-terminal voltage-stabilizing chip
V14, output filter circuit export, and described input filter circuit includes that electric capacity C14 and C11, described output filter circuit include electricity
Hold C15 and C12.
Compared with prior art, the beneficial effect body of a kind of acquisition terminal dual power supply control switching circuit of the present utility model
Present:
1, a kind of acquisition terminal double-power supply switching device of the present utility model, embedded micro-processor control circuit, can be real-time
Monitoring main power supply and the voltage signal of auxiliary power supply source, and according to practical situation, send control signal in real time, it is achieved main power supply
Automatic switchover with auxiliary power supply source.
2, in the case of external power source has electricity but lacks a phase, a kind of acquisition terminal dual power supply switching dress of the present utility model
Put the guarantee normal working power of acquisition terminal, it is to avoid the terminal that non-faulting reason causes is stopped transport.On-site terminal power supply wiring without
Method is changed and reclosing with external power source, and terminal only waits that user's external power source again switches to primary power cource and could work.
3, maintainer's workload is reduced.Owing to user falls electric, acquisition terminal loses power supply cannot be with master station communication.This
In the case of terminal can not gather data, have influence on normal function application." joining with main website occurs in acquisition system main station judging terminal
It is not " fault, maintainer must arrive scene and ascertain the reason.Use a kind of acquisition terminal dual power supply switching of the present utility model
The switching device of control circuit, the outside electricity of user, terminal supplying power switches therewith, normally works.Maintainer need not existing
Field is gone.
4, device volume is little, easy for installation.Less (Overall Power Consumption < the 3W of power consumption；< 10VA) disclosure satisfy that wanting of work on the spot
Ask.A kind of acquisition terminal double-power supply switching device of the present utility model, the back side is provided with installation guide rail, is mountable to wall, or
In metering cabinet, it is not necessary to user's power distribution room is transformed or changed, investment reduction.
Accompanying drawing explanation
Fig. 1 is the circuit structure block diagram of acquisition terminal dual power supply control switching circuit of the present utility model.
Fig. 2 is the circuit theory diagrams of the main power supply voltage detecting circuit in Fig. 1.
Fig. 3 is the main power supply in Fig. 1 and the circuit theory diagrams of auxiliary power supply source switching selecting circuit.
Fig. 4 is the circuit theory diagrams of the main power supply change-over circuit in Fig. 1.
Fig. 5 is the circuit theory diagrams of the auxiliary power supply source change-over circuit in Fig. 1.
Fig. 6 is the circuit theory diagrams of the microprocessor power supply circuit in Fig. 1.
Fig. 7 is the top view of a kind of acquisition terminal double-power supply switching device of the present utility model
Fig. 8 is to be the left view of a kind of acquisition terminal double-power supply switching device of the present utility model.
Being labeled as of each parts in accompanying drawing: main power supply voltage detecting circuit 11, auxiliary power supply source voltage detecting circuit 12, main
Power supply source change-over circuit 13, auxiliary power supply source change-over circuit 14, microprocessor control circuit 15, microprocessor power supply circuit 16, master
Power supply source and auxiliary power supply source switching selecting circuit 17.
Detailed description of the invention
Elaborating embodiment of the present utility model below, the present embodiment is being front with technical solutions of the utility model
Put and implement, give detailed embodiment and concrete operating process, but protection domain of the present utility model does not limits
In following embodiment.
A kind of acquisition terminal double-power supply switching device, including housing, the back side of described housing is provided with rail plate, described shell
The front of body is provided with binding post, display interface and control knob, built-in main power supply voltage detecting circuit in described housing, auxiliary
Power supply source voltage detecting circuit, main power supply change-over circuit, auxiliary power supply source change-over circuit, microprocessor control circuit, micro-process
Device power supply circuits, main power supply and auxiliary power supply source switching selecting circuit.Seeing Fig. 7 and Fig. 8, Fig. 7 is one of the present utility model
The top view of acquisition terminal double-power supply switching device.The front of housing is provided with 40 road binding posts 2.Fig. 8 is for being this utility model
The left view figure of a kind of acquisition terminal double-power supply switching device.The back side of this device is provided with installation guide rail 1, is mountable to wall
In wall, or metering cabinet, it is not necessary to user's power distribution room is transformed or changed, investment reduction.
See the circuit structure block diagram that Fig. 1, Fig. 1 are acquisition terminal dual power supply control switching circuits of the present utility model.One
Plant in acquisition terminal double-power supply switching device built-in:
Main power supply input circuit, main power supply is inputted by main power supply input circuit, cuts for acquisition terminal dual power supply
Change control and the input of 100V main power source is provided；
Auxiliary power supply source input circuit, auxiliary power supply source is inputted by auxiliary power supply source input circuit, cuts for acquisition terminal dual power supply
Change control and the input of 100V auxiliary power supply source is provided；
Main power supply and auxiliary power supply source switching selecting circuit 17, described main power supply input circuit and auxiliary power supply source input electricity
Ground, road outfan all electrically connects with main power supply and auxiliary power supply source switching selecting circuit input, described main power supply input circuit
Out-put supply is selected by main power supply and the switching of auxiliary power supply source switching selecting circuit with auxiliary power supply source input circuit；
Main power supply change-over circuit 13, main power supply is inputted by main power supply input circuit, main power supply input circuit
The input of outfan and main power supply change-over circuit be electrically connected with, main power supply by main power supply change-over circuit blood pressure lowering is
10V power supply exports；
Auxiliary power supply source change-over circuit 14, auxiliary power supply source is inputted by auxiliary power supply source input circuit, auxiliary power supply source input circuit
The input of outfan and auxiliary power supply source change-over circuit be electrically connected with, auxiliary power supply source by auxiliary power supply source change-over circuit blood pressure lowering is
9V power supply exports；
Microprocessor control circuit 15, the signal output part of microprocessor control circuit is cut with main power supply and auxiliary power supply source
The signal input part changing selection circuit is electrically connected with；The input of described microprocessor control circuit and described main power supply electricity
Pressure testing circuit electrically connects with the outfan of auxiliary power supply source voltage detecting circuit；
Microprocessor power supply circuit 16, the input of described main power supply change-over circuit and auxiliary power supply source change-over circuit all with
The input of microprocessor power supply circuit is electrically connected with, and the outfan of described microprocessor power supply circuit controls electricity with microprocessor
The input electrical connection on road, described microprocessor power supply circuit accepts main power supply change-over circuit and auxiliary power supply source change-over circuit is defeated
Enter, and automatically select a road as power supply, and be 3.3V output by its blood pressure lowering；
Main power supply voltage detecting circuit 11, the input of main power supply voltage detecting circuit and main power supply input circuit
Outfan electrical connection, whether the input of described main power supply voltage detecting circuit detection main power supply normal and signal is defeated
Give microprocessor power supply circuit；
Auxiliary power supply source voltage detecting circuit 12, the input of auxiliary power supply source voltage detecting circuit and auxiliary power supply source input circuit
Outfan electrical connection, whether the input that described auxiliary power supply source voltage detecting circuit detects auxiliary power supply source normal and signal is defeated
Give microprocessor power supply circuit.
See the circuit theory diagrams that Fig. 2, Fig. 2 are the main power supply voltage detecting circuits in Fig. 1.Main power supply voltage detecting
Circuit includes resistance R1, R2, R3, R5, R6, R7, R8 and R30, voltage transformer CT1 and CT2, diode V2, V9, main power supply
A phase input series resistance R1, be connected with voltage transformer CT1 after R2, R3, the B phase input of main power supply is mutual with voltage
Sensor CT1 and CT2 is all connected with, and is connected with voltage transformer CT2 after C phase input series resistance R5 of main power supply, R6, R7,
Voltage transformer CT1 and resistance R30, diode V2 are in parallel, and voltage transformer CT2 and resistance R8, diode V9 are in parallel.
Main power supply voltage detecting circuit detects the voltage between the AB phase of main power supply and BC phase in real time.A phase input
3 current-limiting resistance R1, R2, R3 resistances of series connection are all 33K, add up 99K, input current is pulled down to 1mA.Voltage transformer
The model of CT1 is TV31B022mA:2mA, maximum input current 2mA, no-load voltage ratio 1:1.The two of the outfan parallel connection of voltage transformer
Pole pipe V2 is used for rectification, and exchange is become direct current.Resistance R30 (resistance 220 ohm) changes into the electric current of 1mA the electricity of 0.22V
Pressure.When A phase is broken phase, and the voltage that AD_UAB1 detects just is become 0V by 0.22V；When C phase is broken phase, the voltage that AD_UCB1 detects
Just become 0V by 0.22V；When B phase is broken phase, and the voltage that AD_UAB1 and AD_UCB1 detects all is become 0V by 0.22V.Auxiliary power supply
The circuit theory of source voltage detecting circuit is with the circuit theory of main power supply voltage detecting circuit, therefore here is omitted.
Seeing Fig. 3, Fig. 3 is the main power supply in Fig. 1 and the circuit theory diagrams of auxiliary power supply source switching selecting circuit.Described master
Power supply source and auxiliary power supply source switching selecting circuit include relay K 1, K2, K3, K4, diode V101, V102, V103, V104,
Critesistor RT101, RT102, RT101.
Main power supply and auxiliary power supply source switching selecting circuit control the switching of main power source and accessory power supply by relay,
Including the switching of phase and phase between power supply.Relay K 1, the model of K2, K3, K4 are HFD4/9, DPDT.Each relay
One diode of top all reverse parallel connections, this diode plays afterflow effect, can produce one when the actuating of relay when
Individual bigger induced voltage, by this diode, provides a loop to the induced voltage produced, it is to avoid to damage relay.When
In the case of the disconnected phase of A phase being detected, the when of relay K 1 action, B_IN_1 connects with (3) A_IN_2, B_IN_2, A_IN_2
Connecting, the B phase of main power source and accessory power supply can be adjusted to A phase, and original B phase still has electricity；When detecting that C phase is broken phase, continue
The operating principle of electrical equipment K4 is the same with K1；In the case of relay K 2 and K3 action simultaneously, it is possible to realize main power source A, B, C tri-
A, B, C three-phase with accessory power supply is exchanged the most respectively, thus realizes the main power source switching to accessory power supply, and this switching can
Manually to switch, or in the case of chip detection wherein has biphase disconnected phase to ABC three-phase, oneself switches over.
See the circuit theory diagrams that Fig. 4, Fig. 4 are the main power supply change-over circuits in Fig. 1.Main power supply change-over circuit includes
First input circuit, first control circuit, the first compensation circuit, the first reduction voltage circuit and the first feedback circuit；Described first defeated
Enter circuit and include critesistor RT1, RT3, RT4, commutation diode V1, V5, V19, V22, V40, V41, thermal resistor RT2,
Electric capacity C1；Described first control circuit includes that controller, described controller are TOP232P controller；Described first compensates circuit
Including resistance R15 and electric capacity C9；Described first reduction voltage circuit includes transformator T1, Zener diode V4, V2, V7, electric capacity C3,
C4、C6、C15；Described first feedback circuit includes optocoupler E3, resistance R10, R9, R11, diode V12, V11, Zener diode
V10。
First input circuit, at A, B, C three-phase input end of the first input circuit, each phase has all been connected a rectification two
Pole is managed, and a commutation diode in opposite direction the most in parallel, and it is low that this diode has reverse leakage current, just
To the feature that surge ability to bear is strong, while rectification, it also is able to protection circuit；Input is tri-two poles of V1, V19, V40
The negative electrode of pipe is shorted together, and the anode of tri-diodes of V5, V22, V41 is shorted together, when A, B, C three-phase has a phase to break phase
In the case of, the most biphase can also bio-occlusion circuit provide 100V alternating current.
Having accessed a thermal resistor RT2 after diode, thermal resistor RT2 is compound critesistor
MZ11-06E151-251RM, as the overheated anti-lightning strike protection of overcurrent-overvoltage.Compound critesistor MZ11-06E151-251RM
Electronic engineering is named again ten thousand electric fuses or resettable fuse.Owing to it is to temperature and the doubling sensitivity of electric current so that it is
Compensate for that temperature switch is insensitive to electric current, the temperature-resistant shortcoming of conventional fuse silk so that it is there is fast response time, guarantor
Ability of protecting is strong, high reliability.Its protection philosophy is: it is connected in load circuit, when circuit is in normal work
The electric current flowing through PTC thermistor during state is not enough so that its temperature rise exceedes Curie temperature and is in low resistive state, once circuit
Breaking down or time overvoltage makes that in loop, electric current is uprushed, the resistance of PTC thermistor rises 3-4 number at short notice because of self-heating
Magnitude is that high-impedance state is by circuitry cuts.When, after failture evacuation, PTC themistor recovers again former conducting state.Composite type heat
The electrochemical capacitor of a 0.33UF/400V in parallel after quick resistance, this electric capacity is primarily used to filtering, is used for eliminating whole
The AC ripple ripple produced after stream, improves the galvanic voltage magnitude of 100V simultaneously
First control circuit, first control circuit includes that controller, described controller are TOP232P controller；This chip
It is the encapsulation of bi serie 8 foot, input ac voltage 85-265V operating frequency 130KHZ.The pin of TOP232P controller:
Drain electrode (D) pin: high-voltage MOSFET drain lead exports, is provided by internal switching regulator high-voltage current source and starts
Bias current, this pin or internal current test point.
Control pin (C): for error amplifier and the input pin of feedback current of Duty ratio control, steady with internal parallel
Depressor is connected, it is provided that internal bias current during normal work.Also act as electrical power by-pass and automatically restart/compensate electric capacity
Junction point.
When TOP232P controller D pin turn on time, the induced voltage of high frequency transformer T1 armature winding be upper just under
Negative, the commutation diode V4 of secondary coil (7T) is in cut-off state, and now circuit stores energy in armature winding；Work as switch
When the D pin of power supply chip cuts, the energy of storage in high frequency transformer T1 armature winding, will be by secondary windings and rectification two pole
Pipe V4 rectification and electric capacity C4, C3 filtering backward load output galvanic current pressure.
First feedback circuit feedback circuit: the first feedback circuit includes optocoupler E3, resistance R10, R9, R11, diode V12,
V11, Zener diode V10.The model of optocoupler E3 is TLP785, minimum forward diode voltage 1.2V, maximum μ fall time 3
S, maximum forward diode current 25mA, maximum rise time 2 μ s, current transfer ratio (maximum) 600, current transfer ratio (minimum)
200.Wherein the conducting that reverse-conducting pressure drop is 6.2V, V11 and the V12 pressure of diode V10 (IN5234) is 0.7V, so works as light
The when of coupling conducting, the current potential at the negative electrode of optocoupler diode is clamped at 7.6V, adds the conduction voltage drop of optocoupler diode itself
About 1.2V, the same with the upper voltage of R11, add the dividing potential drop of R9, (resistance of R9 with R11 is the same, is all 300 Europe
Nurse), 7.6+1.2+1.2=10V, namely in the case of the DC voltage of output is more than 10V, optocoupler can be switched on, and C draws
Foot detects that electric current becomes big, and drain electrode (D) pin will be opened, and simple will temporarily interruption of transformator transmits energy to secondary, from
And reduce output voltage, it is that output voltage maintains 10V.
See the circuit theory diagrams that Fig. 5, Fig. 5 are the auxiliary power supply source change-over circuits in Fig. 1.Auxiliary power supply power-switching circuit bag
Include the second input circuit, second control circuit, the second compensation circuit, the second reduction voltage circuit and the second feedback circuit；Described second
Input circuit includes critesistor RT5, RT6, RT8, commutation diode V42, V43, V44, V45, V46, V47, thermal resistor
RT6, electric capacity C17；Described second control circuit includes that controller, described controller are TOP232P controller；Described first compensates
Circuit includes resistance R24 and electric capacity C22；Described second reduction voltage circuit includes transformator T2, Zener diode V21, V20, V24,
Electric capacity C18, C19, C20, C21；Described second feedback circuit includes optocoupler E6, resistance R22, R21, R23, diode V31, voltage stabilizing
Diode V27.
The schematic diagram of auxiliary power supply source change-over circuit and the schematic diagram of main power supply change-over circuit are basically identical, uniquely distinguish
It is the feedback circuit of an auxiliary electric power supply general-purpose diode fewer than the schematic diagram of main electricity, so makes optocoupler two
Clamp voltage at the tube cathode of pole reduces about 0.7V, and therefore the operation voltage of optocoupler about reduces fast 1V so that output
DC voltage voltage be about 9V.
See the circuit theory diagrams that Fig. 6, Fig. 6 are the microprocessor power supply circuit in Fig. 1.Microprocessor power supply circuit includes
Diode V13 and V16, three-terminal voltage-stabilizing chip V14, electric capacity C14 and C11, electric capacity C15 and C12, main power supply change-over circuit inputs
10V power supply connects diode V13, and auxiliary power supply source change-over circuit input 9V power supply connects diode V14, then by input filter electricity
Road, three-terminal voltage-stabilizing chip V14, output filter circuit output, described input filter circuit includes electric capacity C14 and C11, described output
Filter circuit includes electric capacity C15 and C12.
One road main power supply input 10V, a road auxiliary power supply source 9V input, select a wherein road electric as input during work
Source, the input of two-way power supply has all added an IN5819 diode, and main purpose is to prevent the dry of power circuit below
Disturb and be delivered to previous circuit, C14 and C11 two electric capacity composition input filter circuit.V14 is UTC-78L05 three-terminal voltage-stabilizing voltage stabilizing core
Sheet, is output as 5V unidirectional current, C15 and C12 forms output filter circuit.
It it is more than a kind of embodiment of the present utility model.It should be pointed out that, those of ordinary skill in the art is come
Say, on the premise of without departing from this utility model principle, it is also possible to make some deformation and improvement.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all in this practicality
Any amendment, equivalent and the improvement etc. made within novel spirit and principle, should be included in guarantor of the present utility model
Within the scope of protecting.
Be to be understood that example as herein described and embodiment only for explanation, those skilled in the art can make according to it
Various amendments or change, in the case of without departing from this utility model spirit, broadly fall into protection domain of the present utility model.
Claims (3)
1. an acquisition terminal double-power supply switching device, including housing, the back side of described housing is provided with rail plate, described housing
Front be provided with binding post, display interface and control knob, it is characterised in that: built-in in described housing
Main power supply input circuit, main power supply is inputted by main power supply input circuit, for the switching control of acquisition terminal dual power supply
System provides the input of 100V main power source；
Auxiliary power supply source input circuit, auxiliary power supply source is inputted by auxiliary power supply source input circuit, for the switching control of acquisition terminal dual power supply
System provides the input of 100V auxiliary power supply source；
Main power supply and auxiliary power supply source switching selecting circuit, described main power supply input circuit and auxiliary power supply source input circuit ground are defeated
Go out end all to electrically connect with main power supply and auxiliary power supply source switching selecting circuit input, described main power supply input circuit and auxiliary confession
Power supply input circuit selects out-put supply by main power supply and the switching of auxiliary power supply source switching selecting circuit；
Main power supply change-over circuit, main power supply is inputted by main power supply input circuit, the output of main power supply input circuit
End is electrically connected with the input of main power supply change-over circuit, and main power supply is 10V electricity by main power supply change-over circuit blood pressure lowering
Source exports；
Auxiliary power supply source change-over circuit, auxiliary power supply source is inputted by auxiliary power supply source input circuit, the output of auxiliary power supply source input circuit
End is electrically connected with the input of auxiliary power supply source change-over circuit, and auxiliary power supply source is 9V power supply by auxiliary power supply source change-over circuit blood pressure lowering
Output；
Microprocessor control circuit, the signal output part of microprocessor control circuit selects with main power supply and the switching of auxiliary power supply source
The signal input part of circuit is electrically connected with；The input of described microprocessor control circuit and main power supply voltage detecting circuit with
The outfan electrical connection of auxiliary power supply source voltage detecting circuit；
Microprocessor power supply circuit, the input of described main power supply change-over circuit and auxiliary power supply source change-over circuit all with micro-process
The input of device power supply circuits is electrically connected with, and the outfan of described microprocessor power supply circuit is defeated with microprocessor control circuit
Entering end electrical connection, described microprocessor power supply circuit accepts main power supply change-over circuit and the input of auxiliary power supply source change-over circuit, and
Automatically select a road as power supply, and be 3.3V output by its blood pressure lowering；
The output of main power supply voltage detecting circuit, the input of main power supply voltage detecting circuit and main power supply input circuit
End electrical connection, the input of described main power supply voltage detecting circuit detection main power supply is the most normal, and transmits signal to micro-
Processor power supply；
Auxiliary power supply source voltage detecting circuit, the input of auxiliary power supply source voltage detecting circuit is defeated with auxiliary power supply source input circuit
Going out end electrical connection, the input that described auxiliary power supply source voltage detecting circuit detects auxiliary power supply source is the most normal, and transmits signal to
Microprocessor power supply circuit；
Described main power supply change-over circuit includes the first input circuit, first control circuit, the first compensation circuit, the first blood pressure lowering electricity
Road and the first feedback circuit；
Described first input circuit includes critesistor RT1, RT3, RT4, commutation diode V1, V5, V19, V22, V40, V41,
Thermal resistor RT2, electric capacity C1；
Described first control circuit includes that controller, described controller are TOP232P controller；Described first compensates circuit includes
Resistance R15 and electric capacity C9；
Described first reduction voltage circuit includes transformator T1, Zener diode V4, V2, V7, electric capacity C3, C4, C6, C15；
Described first feedback circuit includes optocoupler E3, resistance R10, R9, R11, diode V12, V11, Zener diode V10；
Described auxiliary power supply source change-over circuit includes the second input circuit, second control circuit, the second compensation circuit, the second blood pressure lowering electricity
Road and the second feedback circuit；
Described second input circuit includes critesistor RT5, RT6, RT8, commutation diode V42, V43, V44, V45, V46,
V47, thermal resistor RT6, electric capacity C17；
Described second control circuit includes that controller, described controller are TOP232P controller；Described second compensates circuit includes
Resistance R24 and electric capacity C22；
Described second reduction voltage circuit includes transformator T2, Zener diode V21, V20, V24, electric capacity C18, C19, C20, C21；
Described second feedback circuit includes optocoupler E6, resistance R22, R21, R23, diode V31, Zener diode V2.
A kind of acquisition terminal double-power supply switching device the most according to claim 1, it is characterised in that: described main power supply electricity
Pressure testing circuit includes resistance R1, R2, R3, R5, R6, R7, R8 and R30, voltage transformer CT1 and CT2, diode V2, V9, master
Be connected with voltage transformer CT1 after A phase input series resistance R1 of power supply source, R2, R3, the B phase input of main power supply with
Voltage transformer CT1 and CT2 is all connected with, with voltage transformer CT2 after C phase input series resistance R5 of main power supply, R6, R7
Connecting, voltage transformer CT1 and resistance R30, diode V2 are in parallel, and voltage transformer CT2 and resistance R8, diode V9 are in parallel.
A kind of acquisition terminal double-power supply switching device the most according to claim 1, it is characterised in that: described microprocessor supplies
Electricity circuit includes diode V13 and V16, and three-terminal voltage-stabilizing chip V14, electric capacity C14 and C11, electric capacity C15 and C12, main power supply turns
Changing circuit input 10V power supply and connect diode V13, auxiliary power supply source change-over circuit input 9V power supply connects diode V14, then passes through
Input filter circuit, three-terminal voltage-stabilizing chip V14, output filter circuit export, described input filter circuit include electric capacity C14 and
C11, described output filter circuit includes electric capacity C15 and C12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520860640.XU CN205693430U (en) | 2015-10-30 | 2015-10-30 | A kind of acquisition terminal double-power supply switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520860640.XU CN205693430U (en) | 2015-10-30 | 2015-10-30 | A kind of acquisition terminal double-power supply switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205693430U true CN205693430U (en) | 2016-11-16 |
Family
ID=57264351
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520860640.XU Active CN205693430U (en) | 2015-10-30 | 2015-10-30 | A kind of acquisition terminal double-power supply switching device |
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| Country | Link |
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| CN (1) | CN205693430U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107632198A (en) * | 2017-10-20 | 2018-01-26 | 国家电网公司 | A kind of dual power supply electric quantity collector and its application method |
| CN108535522A (en) * | 2018-06-19 | 2018-09-14 | 国网安徽省电力有限公司滁州供电公司 | A kind of solution specially becomes client and does not power the devices of low pressure ammeter acquisition problems |
-
2015
- 2015-10-30 CN CN201520860640.XU patent/CN205693430U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107632198A (en) * | 2017-10-20 | 2018-01-26 | 国家电网公司 | A kind of dual power supply electric quantity collector and its application method |
| CN107632198B (en) * | 2017-10-20 | 2023-11-21 | 国网安徽省电力公司滁州供电公司 | Dual-power electric quantity acquisition device and application method thereof |
| CN108535522A (en) * | 2018-06-19 | 2018-09-14 | 国网安徽省电力有限公司滁州供电公司 | A kind of solution specially becomes client and does not power the devices of low pressure ammeter acquisition problems |
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