CN208520906U - Stray electrical current simulator - Google Patents
Stray electrical current simulator Download PDFInfo
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- CN208520906U CN208520906U CN201820999093.7U CN201820999093U CN208520906U CN 208520906 U CN208520906 U CN 208520906U CN 201820999093 U CN201820999093 U CN 201820999093U CN 208520906 U CN208520906 U CN 208520906U
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Abstract
This application involves a kind of stray electrical current simulators, comprising: power supply mould group, clock generate mould group, random interference voltages generate mould group and output driving mould group；The input terminal of power supply mould group is for connecing external ac power source；The output end of power supply mould group is respectively that clock generates mould group, random interference voltages generate mould group and output driving mould group provides working power；Clock generates the input terminal of mould group for being electrically connected with external ac power source, and the output end that clock generates mould group is electrically connected with the input terminal that random interference voltages generate mould group；The output end that random interference voltages generate mould group is electrically connected with the first input end of output driving mould group；Second input terminal of output driving mould group with external ac power source for being electrically connected；Output driving mould group exports the simulation stray electrical current signal containing direct current and AC signal, the adaptive testing for stray current drainage device and drainage groundbed etc..
Description
Technical field
The utility model relates to stray electrical current fields, more particularly to a kind of stray electrical current simulator.
Background technique
Stray current drainage is one of important technology of protective conduit, is realized at present commonly using drainage groundbed or electric drainager
Drainage to stray electrical current, to ensure that protected pipeline is not corroded.It is tried in the design to drainage mode, electric drainager etc.
When testing, due to lacking stray electrical current signal source, such test can only be carried out, in practical application scene often to test electric drainager
And the parameters such as drainage performance of drainage mode, so no equipment can detect its applicability before electric drainager puts into operation.It must so having
A kind of stray electrical current simulator is provided.
Utility model content
Based on this, it is necessary to drainage equipment aiming at the problem that can not detect its applicability before putting into operation, provide one kind
Stray electrical current simulator.
On the one hand, the utility model embodiment provides a kind of stray electrical current simulator, comprising: power supply mould group, clock
Generate mould group, random interference voltages generate mould group and output driving mould group；
The input terminal of power supply mould group is for connecing external ac power source；The output end of power supply mould group is respectively that clock generates mould
Group, random interference voltages generate mould group and output driving mould group provides working power；
Clock generates the input terminal of mould group for be electrically connected with external ac power source, clock generate mould group output end and with
Machine interference voltages generate the input terminal electrical connection of mould group；
The output end that random interference voltages generate mould group is electrically connected with the first input end of output driving mould group；
The input terminal of output driving mould group is also used to be electrically connected with external ac power source；The output end of output driving mould group is used
Stray electrical current signal is simulated in output.
Power supply mould group further includes that the first transformer, the first rectification circuit and generating positive and negative voltage are raw in one of the embodiments,
At unit；
The primary coil of first transformer with external ac power source for being electrically connected, the secondary coil of the first transformer and the
The input terminal of one rectification circuit is electrically connected；The middle position of secondary coil is grounded；
First output end of the first rectification circuit is electrically connected with the first input end of generating positive and negative voltage generation unit, the first rectification
The second output terminal of circuit is electrically connected with the second input terminal of generating positive and negative voltage generation unit；
First output end of generating positive and negative voltage generation unit is for providing positive voltage, the second output of generating positive and negative voltage generation unit
End is for providing negative voltage.
Stray electrical current simulator further includes that AC influence voltage generates mould group in one of the embodiments,；
AC influence voltage generates the input terminal of mould group for being electrically connected with external ac power source, and AC influence voltage generates
The output end of mould group is electrically connected with the input terminal of output driving mould group.
It includes square wave generation unit and frequency divider that clock, which generates mould group, in one of the embodiments,；
Power supply Mo Zu provides operating voltage respectively for square wave generation unit and frequency divider；
The input terminal of square wave generation unit for be electrically connected with external ac power source, the output end of square wave generation unit with divide
The input terminal of frequency device is electrically connected；
The output end of frequency divider is electrically connected with the input terminal that random interference voltages generate mould group.
Square wave generation unit includes first resistor, first capacitor, diode and first crystal in one of the embodiments,
Pipe；
One end of first resistor for being electrically connected with external ac power source, the other end of first resistor and the first transistor
Base stage connection；
The plus earth of diode, the cathode of diode and the base stage of the first transistor connect；
One end of first capacitor and the base stage of the first transistor connect, the other end ground connection of first capacitor；
The emitter of the first transistor is grounded；The collector of the first transistor is electrically connected with the output end of power supply mould group；And
The collector of the first transistor is electrically connected with the input terminal of frequency divider.
It includes divider, Multipexer selection point that random interference voltages, which generate mould group, in one of the embodiments,
Orchestration and interference voltage array；
Interference voltage array provides power supply by power supply mould group, and interference voltage array and Multipexer selection distributor connect
It connects；
The input terminal of divider is electrically connected with the output end of frequency divider；
The output end of divider is connect with the input terminal of Multipexer selection distributor；
The output end of Multipexer selection distributor is connect with the input terminal of output driving mould group, and Multipexer selection point
Orchestration is used for the electric signal transmitted according to divider, a current potential in selection output interference voltage array to output driving mould
Group.
Stray electrical current simulator further includes sacrificial anode Potential analogue mould group in one of the embodiments,；Power supply mould
Group includes Potential analogue power supply unit；The volume input terminal of Potential analogue power supply unit is for connecting external ac power source；
The input terminal of sacrificial anode Potential analogue mould group is connect with the output end of Potential analogue power supply unit；
The output end of sacrificial anode Potential analogue mould group is for exporting sacrificial anode simulation current potential.
Sacrificial anode Potential analogue mould group includes simulation current potential resistance unit in one of the embodiments,；Potential analogue
Power supply unit includes the second transformer, the second rectification circuit and the first voltage stabilizing chip；
The primary coil of second transformer with external ac power source for being electrically connected, the secondary coil of the second transformer and the
The electrical connection of two rectification circuits；
First output end of the second rectification circuit is electrically connected with the input terminal of the first voltage stabilizing chip, and the of the second rectification circuit
Two output ends are electrically connected with the common end of the first voltage stabilizing chip, the output end ground connection of the first voltage stabilizing chip；
The first end ground connection for simulating current potential resistance unit simulates the second end and the first voltage stabilizing chip of current potential resistance unit
Common end electrical connection；
The third end of simulation current potential resistance unit is for exporting sacrificial anode simulation current potential.
Simulation current potential resistance unit includes the first adjustable resistance and the second adjustable resistance in one of the embodiments,；It is sacrificial
It includes that the first sacrificial anode simulation current potential and the second sacrificial anode simulate current potential that domestic animal anode, which simulates current potential,；
First adjustable resistance and the second adjustable resistance are sequentially connected in series between ground and the common end of the first voltage stabilizing chip electricity；
The current potential output end of first adjustable resistance simulates current potential for exporting the first sacrificial anode；
The current potential output end of second adjustable resistance simulates current potential for exporting the second sacrificial anode.
Stray electrical current simulator further includes signal offset correction mould group in one of the embodiments,；
Signal offset correction mould group provides operating voltage by power supply mould group；
The output end of signal offset correction mould group is electrically connected with the input terminal of output driving mould group.
One or more embodiment provided by the utility model at least has the advantages that the utility model embodiment
A kind of stray electrical current provided simulates interference simulation device, comprising: power supply mould group, clock generate mould group, random DC influence electricity
Pressure generates mould group and output driving mould group；The input terminal of power supply mould group is for connecing external ac power source；The output end of power supply mould group
Respectively clock generates mould group, random interference voltages generate mould group and output driving mould group provides working power；Clock is raw
It is used to be electrically connected with external ac power source at the input terminal of mould group, clock generates the output end and random interference voltages of mould group
Generate the input terminal electrical connection of mould group；It is first defeated to generate the output end of mould group and output driving mould group for random interference voltages
Enter end electrical connection；Second input terminal of output driving mould group with external ac power source for being electrically connected；Output driving mould group it is defeated
Outlet is for exporting simulation stray electrical current signal.The AC signal that external ac power source provides generates after oversampling clock generates mould group
Clock signal, clock signal input to random interference voltages generate mould group, so that random DC voltage is generated mould group and give birth at random
At d. c. voltage signal, the AC signal that then d. c. voltage signal and external ac power source provide passes through output driving mould group
Mixing after output simulation stray electrical current signal, the adaptive testing for stray current drainage device and drainage groundbed etc..
Detailed description of the invention
Fig. 1 is the electrical block diagram of stray electrical current simulator in one embodiment；
Fig. 2 is the electrical block diagram of stray electrical current simulator in another embodiment；
Fig. 3 is the electrical block diagram of stray electrical current simulator in further embodiment；
Fig. 4 is the electrical block diagram of stray electrical current simulator in another embodiment.
Specific embodiment
The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model,
It states.The preferred embodiment of the utility model is given in attached drawing.But the utility model can come in many different forms in fact
It is existing, however it is not limited to embodiment described herein.On the contrary, purpose of providing these embodiments is makes public affairs to the utility model
It is more thorough and comprehensive to open content.
It should be noted that it can be directly to separately when an element is considered as " connection " another element
One element and it is in combination be integrated, or may be simultaneously present centering elements.Term as used herein " installation ", " one
End ", " other end " and similar statement are for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term " and or " used herein includes
Any and all combinations of one or more related listed items.
The utility model embodiment provides a kind of stray electrical current simulator, as shown in Figure 1, comprising: power supply mould group 200,
Clock generates mould group 300, random interference voltages generate mould group 400 and output driving mould group 500, power supply mould group 200 it is defeated
Entering end for connecing external ac power source 100, the output end of power supply mould group 200 is respectively that clock generates mould group 300, random direct current is done
Disturb voltage and generate mould group 400 and output driving mould group 500 and working power is provided, the input terminal that clock generates mould group 300 be used for
External ac power source 100 is electrically connected, and clock generates the output end of mould group 300 and random interference voltages generate mould group 400
Input terminal electrical connection, random interference voltages generate the output end of mould group 400 and the input terminal of output driving mould group 500 is electrically connected
It connects, the input terminal of output driving mould group 500 is also used to be electrically connected with external ac power source 100, the output of output driving mould group 500
End is for exporting simulation stray electrical current signal.
Wherein, power supply mould group 200, which refers to, generates mould group 300 suitable for clock for being converted to external ac power source 100
Deng operating voltage circuit.It is the circuit for referring to be converted to external communication electricity clock signal that clock, which generates mould group 300, is
The selection of subsequent random interference voltages provides clock signal.Random interference voltages generation mould group 400 refers to will
The circuit of enough periodic interference voltages for generating variation at random under the triggering of clock signal.Output driving mould group 500
Refer to, the electricity for the simulation stray electrical current signal that output needs after random interference voltages and external communication electricity being mixed
Road, such as can be mixed method circuit etc..
Specifically, power supply mould group 200 converts the sinusoidal ac of external ac power source 100 to required DC voltage,
Clock generates mould group 300 under the conditions of power supply mould group 200 provides operating voltage, by the sinusoidal ac of external ac power source 100
Signal is converted to clock signal, and clock generates the clock signal that mould group 300 generates and random interference voltages is driven to generate mould group
400 generate periodically variable interference voltages, and then random interference voltages are generated mould group by output driving mould group 500
The external communication electricity combination drive output of the 400 random interference voltages generated and external ac power source 100, it is miscellaneous to provide simulation
Current signal is dissipated, the compatibility test for stray current drainage device, drainage groundbed etc. provides stray electrical current signal, can be in instrument
The test to the instrument is realized before putting into operation, so that the subsequent scheme to pertinent instruments or drainage groundbed etc. is adjusted
Measure.In addition the simulation stray electrical current signal that stray electrical current simulator provided by the embodiment of the utility model provides can also be
During technology is passed on experience, booster action is played to the explanation of the abstract concepts such as stray electrical current phenomenon, potentiometric detection, gives student
Visual impression.
In one of the embodiments, as in Figure 2-4, power supply mould group 200 further includes the first transformer T1, the first rectification
Circuit D2 and generating positive and negative voltage generation unit 210, the primary coil of the first transformer T1 with external ac power source 100 for being electrically connected
It connects, the secondary coil of the first transformer T1 is electrically connected with the input terminal of the first rectification circuit D2, and the middle position of secondary coil connects
First output end on ground, the first rectification circuit D2 is electrically connected with the first input end of generating positive and negative voltage generation unit 210, the first rectification
The second output terminal of circuit D2 is electrically connected with the second input terminal of generating positive and negative voltage generation unit 210, generating positive and negative voltage generation unit 210
The first output end for providing positive voltage, the second output terminal of generating positive and negative voltage generation unit 210 is for providing negative voltage.
Specifically, the primary coil of the first transformer T1 in power supply mould group 200 connects external ac power source 100, it will be external
The electric energy of AC power source 100 is transmitted to the secondary coil of the first transformer T1, the output end of the secondary coil of the first transformer T1
It is electrically connected with the input terminal of the first rectification circuit D2, and the middle position ground connection of secondary coil, so that two of secondary coil are held
One positive one is negative, and the first input end of generating positive and negative voltage generation unit 210 connects the first output end of the first rectification circuit D2, and positive negative electricity
The second input terminal of second the first rectification circuit D2 of input termination of generation unit 210 is pressed, generating positive and negative voltage generation unit 210 is to the
After the DC signal of one rectification circuit D2 transmission carries out steady pressure treatment, exported from the first output end output positive voltage, from second
End output negative voltage.Optionally, generating positive and negative voltage generation unit 210 may include the second voltage stabilizing chip IC4 and third voltage stabilizing chip
The first output end of the first rectification circuit D2 of input termination of IC5, the second voltage stabilizing chip IC4, the output of the second voltage stabilizing chip IC4
End output positive voltage, the second output terminal of the first rectification circuit D2 of input termination of third voltage stabilizing chip IC5, third voltage stabilizing chip
The output end of IC5 exports negative voltage, and the common end of the second voltage stabilizing chip IC4 and the common end of third voltage stabilizing chip IC5 are grounded.
Optionally, the second voltage stabilizing chip IC4 can be the voltage stabilizing chip of LM7805 model, and third voltage stabilizing chip IC5 can be LM7905
The voltage stabilizing chip of model.Optionally, it is serially connected with output filter capacitor C1 between the first output end and ground of the first rectification circuit D2,
Output filter capacitor C2, the output of the second voltage stabilizing chip IC4 are serially connected between the second output terminal and ground of first rectification circuit D2
It is serially connected with output filter capacitor C3 between end and ground, is serially connected with filter capacitor between the output end and ground of third voltage stabilizing chip IC5
C4.Optionally, the positive voltage of the output end output+5V of the second voltage stabilizing chip IC4, the output end output-of third voltage stabilizing chip IC5
The negative voltage of 5V.
In one of the embodiments, as in Figure 2-4, stray electrical current simulator further includes that AC influence voltage generates
Mould group 600, AC influence voltage generate the input terminal of mould group 600 for being electrically connected with external ac power source 100, and AC influence is electric
The output end that pressure generates mould group 600 is electrically connected with the input terminal of output driving mould group 500.
Wherein, it is to refer to convert the sinusoidal ac of external ac power source 100 that AC influence voltage, which generates mould group 600,
For the circuit of required simple alternating current electric signal.Such as AC influence voltage generation mould group 600 can be achieved on external portion
The amplitude transformation for the simple alternating current electric signal that AC power source 100 generates and the circuit of filter action etc..
Specifically, the input that AC influence voltage generates mould group 600 terminates external ac power source 100, by external communication electricity
The sinusoidal ac in source 100 is converted to required simple alternating current electric signal, for the progress AC signal of output driving mould group 500 and directly
The mixing of signal is flowed, to simulate stray electrical current signal.For example, AC influence voltage generation mould group 600 can be by resistance R19, electricity
Position resistance VR4 and resistance R20 composition, a termination external ac power source 100 of resistance R19, another termination current potential electricity of resistance R19
The first terminals of VR4, the second terminals ground connection of current potential resistance VR4 are hindered, and the current potential of current potential resistance VR4 selects terminating resistor
One end of R20, the input terminal of another termination output driving mould group 500 of resistance R20.Wherein, resistance R19, R20 is to external communication
The simple alternating current electric signal that power supply 100 generates can play metering function, select end to export mesh by the current potential of current potential resistance VR4
The simple alternating current electric signal of amplitude is marked, provides suitable simple alternating current electric signal for output driving mould group 500.Optionally, it exchanges
Interference voltage generate mould group 600 include filter capacitor C6, power supply mould group 200 include the first transformer T1, one end of resistance R19 with
The secondary coil of first transformer T1 connects, and the other end of resistance R19 is connect with the first terminals of current potential resistance, and resistance
The cathode of another termination filter capacitor C6 of R20 connects, and the anode of filter capacitor C6 connects with the input terminal of output driving mould group 500
It connects, i.e., the secondary coil sine side-draw that AC influence voltage generates mould group 600 from the first transformer T1 in power supply mould group 200 is handed over
Galvanic electricity signal, and after resistance R19, current potential resistance VR4, resistance R20 and filter capacitor C6, obtain no DC influence signal
Simple alternating current electric signal, the input terminal of output driving mould group 500 is transported to as AC influence voltage, makes output driving mould group
The suitable simulation stray electrical current signal of 500 outputs.
In one of the embodiments, as in Figure 2-4, clock generates mould group 300 and includes square wave generation unit 310 and divide
Frequency device 320, power supply mould group 200 are respectively that square wave generation unit 310 and frequency divider 320 provide operating voltage, square wave generation unit
For 310 input terminal for being electrically connected with external ac power source 100, the output end of square wave generation unit 310 is defeated with frequency divider 320
Enter end electrical connection, the output end of frequency divider 320 is electrically connected with the input terminal that random interference voltages generate mould group 400.
Wherein, square wave generation unit 310 refers to, simple alternating current electric signal can be converted to the circuit of square wave electrical signal.
Frequency divider 320 refers to the circuit that the square-wave signal that can be generated to square wave generation unit 310 is divided.Specifically, power supply mould
Group 200 provides operating voltage for square wave generation unit 310 and frequency divider 320, and the input terminal access of square wave generation unit 310 is outer
The simple alternating current electric signal of portion's AC power source 100, and square wave conversion is carried out to the simple alternating current electric signal, generate square wave telecommunications
Number, the square wave electrical signal that then frequency divider 320 generates square wave generation unit 310 divides, required clock signal is generated,
And the clock signal transmission is generated to the input terminal of mould group 400 to random interference voltages, drive random interference voltages
It generates mould group 400 and generates random interference voltages.Optionally, frequency divider 320 can be the frequency divider of model 74LS390
320。
In one of the embodiments, as in Figure 2-4, square wave generation unit 310 includes first resistor R1, first capacitor
C5, diode D1 and the first transistor TR1, one end of first resistor R1 with external ac power source 100 for being electrically connected, the first electricity
The other end of resistance R1 is connect with the base stage of the first transistor TR1, the plus earth of diode D1, the cathode of diode D1 and first
The base stage of transistor TR1 connects, and one end of first capacitor C5 is connect with the base stage of the first transistor TR1, and first capacitor C5's is another
One end ground connection, the collector of the first transistor TR1 are connect with the output end of power supply mould group 200, the emitter of the first transistor TR1
Ground connection, the collector of the first transistor TR1 is electrically connected with the output end of power supply mould group 200, and the collector of the first transistor TR1
It is electrically connected with the input terminal of frequency divider 320.
Specifically, square wave generation unit 310 may include first resistor R1, the first voltage-stabiliser tube D1, first capacitor C5 and
A termination external ac power source 100 of one transistor TR1, first resistor R1, another termination the first transistor of first resistor R1
The base stage of TR1, the first voltage-stabiliser tube D1 plus earth, the cathode of the first voltage-stabiliser tube D1 connect the base stage of the first transistor TR1, the first electricity
Hold the one end C5 ground connection, the base stage of another termination the first transistor TR1, the collector of the first transistor TR1 connects power supply mould group 200
Output end, and the input terminal of the transistor frequency divider 320 of the first transistor TR1, when the simple alternating current of external ac power source 100
When electric signal streams are through square wave generation unit 310, the first transistor TR1 changes according to the amplitude of simple alternating current electric signal, does not turn off
It opens and turns off, to generate square wave electrical signal.The square wave electrical signal that square wave generation unit 310 generates is divided via frequency divider 320
Required clock signal is generated afterwards.
In one of the embodiments, as in Figure 2-4, the input terminal of square wave generation unit 310 and the first transformer T1
Secondary coil electrical connection.Specifically, power supply mould group 200 is that square wave generation unit 310 and frequency divider 320 provide operating voltage,
And the input terminal of square wave generation unit 310 accesses the simple alternating current electric signal of the first transformer T1 second coil side, and just to this
String ac signal carries out square wave conversion, generates square wave electrical signal, then frequency divider 320 generates square wave generation unit 310
Square wave electrical signal is divided, and generates required clock signal, and the clock signal transmission is raw to random interference voltages
At the input terminal of mould group 400, drives random interference voltages to generate mould group 400 and generate random interference voltages.Optionally,
Frequency divider 320 can be the frequency divider 320 of model 74LS390.
In one of the embodiments, as in Figure 2-4, square wave generation unit 310 includes first resistor R1, first capacitor
C5, diode D1 and the first transistor TR1, one end of first resistor R1 are electrically connected with the secondary coil of the first transformer T1,
The other end of first resistor R1 is connect with the base stage of the first transistor TR1, the plus earth of diode D1, the cathode of diode D1
It is connect with the base stage of the first transistor TR1, one end of first capacitor C5 is connect with the base stage of the first transistor TR1, first capacitor
The other end of C5 is grounded, and the collector of the first transistor TR1 is connect with the output end of power supply mould group 200, the first transistor TR1's
Emitter ground connection, the collector of the first transistor TR1 are electrically connected with the output end of power supply mould group 200, and the first transistor TR1
Collector is electrically connected with the input terminal of frequency divider 320.
Specifically, square wave generation unit 310 may include first resistor R1, the first voltage-stabiliser tube D1, first capacitor C5 and
The secondary coil of a first transformer T1 of termination of one transistor TR1, first resistor R1, another termination first of first resistor R1
The cathode of the base stage of transistor TR1, the first voltage-stabiliser tube D1 plus earth, the first voltage-stabiliser tube D1 connects the base stage of the first transistor TR1,
The one end first capacitor C5 ground connection, the base stage of another termination the first transistor TR1, the collector of the first transistor TR1 connect power supply mould
The output end of group 200, and the input terminal of the transistor frequency divider 320 of the first transistor TR1, when the first transformer T1 secondary wire
When enclosing the simple alternating current electric signal streams classical prescription wave generation unit 310 of output, the first transistor TR1 is according to simple alternating current electric signal
Amplitude variation, is constantly switched on and off, to generate square wave electrical signal.The square wave electrical signal warp that square wave generation unit 310 generates
Required clock signal is generated after being divided by frequency divider 320.
In one of the embodiments, as in Figure 2-4, it includes divider that random interference voltages, which generate mould group 400,
410, Multipexer selection distributor 420 and interference voltage array, interference voltage array provide power supply by power supply mould group 200, and
Interference voltage array is connect with Multipexer selection distributor 420, the input terminal of divider 410 and the output end of frequency divider 320
The output end of electrical connection, divider 410 is connect with the input terminal of Multipexer selection distributor 420, Multipexer selection distribution
The output end of device 420 is connect with the input terminal of output driving mould group 500, and Multipexer selection distributor 420 is used for basis and removes
The electric signal that musical instruments used in a Buddhist or Taoist mass 410 transmits, selection export a current potential in interference voltage array to output driving mould group 500.
Wherein, interference voltage array, which refers to, can provide the circuit of multiple current potentials by what multiple resistance formed.Specifically, point
To 410 input terminal of divider, multiple output ends of divider 410 can export not the output end output clock signal of frequency device 320
The square-wave signal of the output end output end of divider 410 is transmitted to Multipexer selection distributor by the square-wave signal of same frequency
420 input terminal, the variation for the waveform that Multipexer selection distributor 420 is transmitted according to divider 410, selection simulation are more
Road selects electric potential signal corresponding to the tie point of a data pin and interference voltage array in distributor 420 as direct current
Interference voltage data are exported to the input terminal of output driving mould group 500, and after the mixing of output driving mould group 500, it is miscellaneous to generate simulation
Dissipate current signal.Optionally, Multipexer selection distributor 420 can be decoder.
For example, 200 offer+5V voltage of power supply mould group and -5V voltage, interference voltage array includes being sequentially connected in series in power supply mould
Resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, electricity between the+5V voltage and -5V voltage of 200 offer of group
R/10, resistance R9 and resistance R11 are hindered, Multipexer, which selects distributor 420, to be the decoder of TC4051 model, Multipexer
Three input terminals B, C, A of selection distributor 420 connect QA, QC, QD of divider 41074LS393, Multipexer selection point respectively
The data pin 0 of orchestration 420 is separately connected resistance R5 and resistance R6, and the corresponding current potential of pin 0, that is, between resistance R5 and resistance R6
Current potential, current potential of the corresponding current potential of pin 1 between resistance R4 and resistance R5, the corresponding current potential of pin 2 be resistance R4 and electricity
The current potential between R5, current potential of the corresponding current potential of pin 3 between resistance R6 and resistance R7 are hindered, the corresponding current potential of pin 4 is electricity
Current potential between resistance R7 and resistance R8, current potential of the corresponding current potential of pin 5 between resistance R9 and resistance R10, pin 6 are corresponding
Current potential of the current potential between resistance R8 and resistance R10, current potential of the corresponding current potential of pin 7 between resistance R9 and resistance R11.Root
The waveform variation transmitted according to 320 3 output pins of frequency divider, Multipexer select the end the COM selection of distributor 420 defeated
Input terminal of the corresponding current potential of a certain data pin to output driving mould group 500 out.And works as and need in stray electrical current signal
When direct current signal is studied, random DC influence electricity directly can be picked out from the COM port of Multipexer selection distributor 420
Pressure is used for test equipment or teaching.Optionally, Multipexer selects distributor 420TC4051 by 200 offer+5V's of power supply mould group
Operating voltage.Optionally, the com port of Multipexer selection distributor 420 also passes through resistance R16 and is grounded.
It wherein, is simcity rail traffic disturbed condition, clock generates mould group 300 can be directly from external ac power source
100 or first the secondary coil of transformer T1 take the simple alternating current electric signal of 220V, by square wave generation unit 310 and
After 74LS390 frequency dividing, the clock signal of 1HZ is generated, the clock signal of this 1Hz is sent to random interference voltages and generates mould group
Double hexadecimal divider 41074LS393 in 400, by 2 seconds, 8 seconds, 256 seconds three random letters extracting divider 410
Number source, makes random interference voltages signal reach 256 seconds interference periods, and it is dry substantially to simulate urban track traffic
Disturb situation, and the Multipexer that they are sent to TC4051 model selected distributor 420, make TC4051 connect at random by R3~
The interference voltage array of R11 composition, outputs a series of interference voltages in the COM foot of TC4051.
In one of the embodiments, as in Figure 2-4, output driving mould group 500 includes second transistor TR2, simulation
The output end of multi-path choice distributor 420 is electrically connected with the base stage of second transistor TR2, and AC influence voltage generates mould group 600
Output end be electrically connected with the base stage of second transistor TR2, the collector of second transistor TR2 and generating positive and negative voltage generation unit
210 the first output end connection, the emitter of second transistor TR2 and the second output terminal of generating positive and negative voltage generation unit 210 connect
It connects, and the emitter of second transistor TR2 is for exporting simulation stray electrical current signal.
Optionally, a limit is concatenated between the base stage of second transistor TR2 and the output end of Multipexer selection distributor 420
It is concatenated on one between the collector of leakage resistance R12, second transistor TR2 and the first output end of generating positive and negative voltage generation unit 210
Pull-up resistor R13.
In one of the embodiments, as in Figure 2-4, stray electrical current simulator further includes sacrificial anode Potential analogue
Mould group 700, power supply mould group 200 include Potential analogue power supply unit 220, and the volume input terminal of Potential analogue power supply unit 220 is used for
External ac power source 100 is connected, the input terminal of sacrificial anode Potential analogue mould group 700 is defeated with Potential analogue power supply unit 220
Outlet connection, the output end of sacrificial anode Potential analogue mould group 700 is for exporting sacrificial anode simulation current potential.
Wherein, Potential analogue power supply unit 220 refers to the power circuit powered for sacrificial anode Potential analogue mould group 700.
It when testing the stray current testers device such as potentiostat, often needs to use sacrificial anode current potential, not sympathize with to meet
Test request under condition, stray electrical current simulator provided by the embodiment of the utility model further include sacrificial anode Potential analogue mould
Group 700 provides sacrificial anode simulation current potential, to meet the needs of under different situations.Specifically, power supply mould group 200 includes current potential
The input of analog power unit 220, Potential analogue power supply unit 220 terminates external ac power source 100, by external ac power source
100 alternating current is converted to DC voltage, and is transported to sacrificial anode Potential analogue mould group 700, sacrificial anode Potential analogue mould
700 output sacrificial anode of group simulates current potential.As needed, sacrificial anode Potential analogue mould group 700 can export zinc sacrificial anode
Current potential is simulated, magnesium sacrificial anode simulation current potential can also be exported.
In one of the embodiments, as in Figure 2-4, sacrificial anode Potential analogue mould group 700 includes simulation current potential electricity
Unit 430 is hindered, Potential analogue power supply unit 220 includes the second transformer T2, the second rectification circuit D3 and the first voltage stabilizing chip
The primary coil of IC6, the second transformer T2 with external ac power source 100 for being electrically connected, the secondary coil of the second transformer T2
It is electrically connected with the second rectification circuit D3, the input terminal electricity of the first output end of the second rectification circuit D3 and the first voltage stabilizing chip IC6
Connection, the second output terminal of the second rectification circuit D3 are electrically connected with the common end of the first voltage stabilizing chip IC6, the first voltage stabilizing chip
The output end of IC6 is grounded, the first end ground connection of simulation current potential resistance unit 430, simulate the second end of current potential resistance unit 430 with
The common end of first voltage stabilizing chip IC6 is electrically connected, and the third end of simulation current potential resistance unit 430 is for exporting sacrificial anode simulation
Current potential.
Wherein, refer to circuit be mainly made of resistance and that current potential can be exported when simulating current potential resistance unit 430.Specifically
, the second transformer T2 primary coil connects external ac power source 100, and the second transformer T2 is by the friendship of external ac power source 100
New ac signal, the ac signal conveying of secondary coil are obtained in second coil side after galvanic electricity signal progress amplitude transformation
To the input terminal of the second rectification circuit D3, after the second rectification circuit D3 carries out shaping to the ac signal, direct current telecommunications is generated
Number, the DC signal that rectification circuit generates is transported to the input terminal of the first voltage stabilizing chip IC6, the first pressure stabilizing by the first output end
Chip IC 6 carries out steady pressure treatment to the DC signal, required working power is generated, for example, the voltage of+5V can be generated.
The output end of first voltage stabilizing chip IC6 is grounded, and the first end of simulation current potential resistance unit 430 is also grounded, and simulates current potential resistance list
The second end of member 430 and the second output terminal of the second rectification circuit D3 are connect with the common end of the first voltage stabilizing chip IC6, then,
Current potential where simulating current potential resistance unit 430 is negative potential, and the three-polar output of simulation current potential resistance unit 430 sacrifices sun
Simulate current potential in pole.Optionally, the first voltage stabilizing chip IC6 can be the first voltage stabilizing chip IC6 of LM7805 model.Optionally,
Output filter capacitor C7 is connected between the first output end and second output terminal of one finishing circuit, the first voltage stabilizing chip IC6's is defeated
Output filter capacitor C8 is connected between outlet and common end.
In one of the embodiments, as in Figure 2-4, simulation current potential resistance unit 430 include the first adjustable resistance and
Second adjustable resistance, it includes that the first sacrificial anode simulation current potential and the second sacrificial anode simulate current potential that sacrificial anode, which simulates current potential,
First adjustable resistance and the second adjustable resistance are sequentially connected in series between ground and the common end of the first voltage stabilizing chip IC6 electricity, and first can
The current potential output end of resistance is adjusted to simulate current potential for exporting the first sacrificial anode, the current potential output end of the second adjustable resistance is for defeated
The second sacrificial anode simulates current potential out.
Common sacrificial anode type, mainly there is zinc sacrificial anode and magnesium sacrificial anode etc. when being handled according to stray electrical current,
For the test request for meeting different electric drainagers and drainage groundbed, simulation current potential resistance unit provided by the embodiment of the utility model
430 can export two sacrificial anode current potentials, specifically, the first adjustable resistance and the second adjustable resistance are sequentially connected in series on ground and
Between the common end of one voltage stabilizing chip IC6, then current potential locating for the first adjustable resistance and the second adjustable resistance is negative potential, first
The current potential output end of adjustable resistance exports the first sacrificial anode and simulates current potential, the current potential output end output second of the second adjustable resistance
Sacrificial anode simulates current potential.For example, magnesium anode, zinc anode Potential analogue mould group can be defeated from the current potential of the first adjustable resistance respectively
" VMg " terminal that the current potential output end of " VZn " terminal and the second adjustable resistance that outlet is drawn is drawn exports about -1.1V respectively
Current potential with -1.45V or so is for detection.
Optionally, simulation current potential resistance unit 430 further include current-limiting resistance R17 and current limliting current potential R18, current-limiting resistance R17,
First adjustable resistance, the second adjustable resistance and current-limiting resistance R18 be sequentially connected in series ground and the common end of the first voltage stabilizing chip IC6 it
Between.Current-limiting resistance R17 and current-limiting resistance R18 can limit the electric current for flowing through the first adjustable resistance and the second adjustable resistance
Stream, so that the first adjustable resistance and the sacrificial anode simulation current potential of the second adjustable resistance output become in a certain range
Change.
In one of the embodiments, as in Figure 2-4, stray electrical current simulator further includes signal offset correction mould group
800, signal offset correction mould group 800 provides operating voltage, the output end of signal offset correction mould group 800 by power supply mould group 200
It is electrically connected with the input terminal of output driving mould group 500.
Stray electrical current signal, stray electrical current simulation dress provided by the embodiment of the utility model are preferably simulated to obtain waveform
Setting further includes signal offset correction mould group 800, and signal offset correction mould group 800 provides operating voltage, signal by power supply mould group 200
The output end of offset mould group is electrically connected with the input terminal of output driving mould group 500, is inputted to output driving mould group 500 random straight
The fluctuation center for flowing interference voltage and AC influence voltage carries out offset correction.For example, signal offset correction mould group 800 can be by
Resistance R15 and current potential resistance VR1 composition, resistance R15 and current potential resistance VR1 are sequentially connected in series in generating positive and negative voltage generation unit 210
Between first output end and the second output terminal of generating positive and negative voltage generation unit 210, the current potential output termination output of current potential resistance VR1
Drive the input terminal of mould group 500.Optionally, when output driving mould group 500 is transistor TR2, the current potential of current potential resistance VR1 is defeated
Outlet is connect with the base stage of transistor TR2.Optionally, the first output end output+5V voltage of generating positive and negative voltage generation unit 210,
Second output terminal output -5V the voltage of generating positive and negative voltage generation unit 210.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (10)
1. a kind of stray electrical current simulator characterized by comprising power supply mould group, clock generate mould group, random DC influence
Voltage generates mould group and output driving mould group；
The input terminal of the power supply mould group is for connecing external ac power source；The output end of the power supply mould group is respectively the clock
Generate mould group, the random interference voltages generate mould group and the output driving mould group provides working power；
The clock generates the input terminal of mould group for being electrically connected with the external ac power source, and the clock generates the defeated of mould group
Outlet is electrically connected with the input terminal that the random interference voltages generate mould group；
The output end that the random interference voltages generate mould group is electrically connected with the input terminal of the output driving mould group；
The input terminal of the output driving mould group is also used to be electrically connected with the external ac power source；The output driving mould group
Output end is for exporting simulation stray electrical current signal.
2. stray electrical current simulator according to claim 1, which is characterized in that the power supply mould group further includes the first change
Depressor, the first rectification circuit and generating positive and negative voltage generation unit；
The primary coil of first transformer with the external ac power source for being electrically connected, the secondary of first transformer
Coil is electrically connected with the input terminal of first rectification circuit；The middle position of the secondary coil is grounded；
First output end of first rectification circuit is electrically connected with the first input end of the generating positive and negative voltage generation unit, described
The second output terminal of first rectification circuit is electrically connected with the second input terminal of the generating positive and negative voltage generation unit；
First output end of the generating positive and negative voltage generation unit is for providing positive voltage, and the second of the generating positive and negative voltage generation unit
Output end is for providing negative voltage.
3. stray electrical current simulator according to claim 1 or 2, which is characterized in that further include that AC influence voltage is raw
At mould group；
The input terminal that the AC influence voltage generates mould group is used to be electrically connected with the external ac power source, the AC influence
The output end that voltage generates mould group is electrically connected with the input terminal of the output driving mould group.
4. according to stray electrical current simulator according to claim 3, which is characterized in that the clock generates mould group and includes
Square wave generation unit and frequency divider；
The power supply Mo Zu provides operating voltage respectively for the square wave generation unit and the frequency divider；
The input terminal of the square wave generation unit for being electrically connected with the external ac power source, the square wave generation unit it is defeated
Outlet is electrically connected with the input terminal of the frequency divider；
The output end of the frequency divider is electrically connected with the input terminal that the random interference voltages generate mould group.
5. stray electrical current simulator according to claim 4, which is characterized in that the square wave generation unit includes first
Resistance, first capacitor, diode and the first transistor；
One end of the first resistor for being electrically connected with the external ac power source, the other end of the first resistor with it is described
The base stage of the first transistor connects；
The plus earth of the diode, the cathode of the diode are connect with the base stage of the first transistor；
One end of the first capacitor is connect with the base stage of the first transistor, the other end ground connection of the first capacitor；
The emitter of the first transistor is grounded；The collector of the first transistor and the output end of power supply mould group electricity
Connection, and the collector of the first transistor is electrically connected with the input terminal of the frequency divider.
6. stray electrical current simulator according to claim 4 or 5, which is characterized in that the random interference voltages
Generating mould group includes divider, Multipexer selection distributor and interference voltage array；
The interference voltage array provides power supply by the power supply mould group, and the interference voltage array and the Multipexer select
Select distributor connection；
The input terminal of the divider is electrically connected with the output end of the frequency divider；
The output end of the divider is connect with the input terminal of Multipexer selection distributor；
The output end of the Multipexer selection distributor is connect with the input terminal of the output driving mould group, and the simulation is more
The electric signal that road selection distributor is used to be transmitted according to the divider, selection export an electricity in the interference voltage array
Position is to the output driving mould group.
7. stray electrical current simulator according to claim 6, which is characterized in that further include sacrificial anode Potential analogue mould
Group；The power supply mould group includes Potential analogue power supply unit；The volume input terminal of the Potential analogue power supply unit is for connecting institute
State external ac power source；
The input terminal of the sacrificial anode Potential analogue mould group is connect with the output end of the Potential analogue power supply unit；
The output end of the sacrificial anode Potential analogue mould group is for exporting sacrificial anode simulation current potential.
8. stray electrical current simulator according to claim 7, which is characterized in that the sacrificial anode Potential analogue mould group
Including simulating current potential resistance unit；The Potential analogue power supply unit includes that the second transformer, the second rectification circuit and first are steady
Press chip；
The primary coil of second transformer with the external ac power source for being electrically connected, the secondary of second transformer
Coil is electrically connected with second rectification circuit；
First output end of second rectification circuit is electrically connected with the input terminal of first voltage stabilizing chip, second rectification
The second output terminal of circuit is electrically connected with the common end of first voltage stabilizing chip, the output termination of first voltage stabilizing chip
Ground；
The first end ground connection of the simulation current potential resistance unit, the second end and described first of the simulation current potential resistance unit is surely
Press the common end electrical connection of chip；
The third end of the simulation current potential resistance unit is for exporting sacrificial anode simulation current potential.
9. stray electrical current simulator according to claim 8, which is characterized in that the simulation current potential resistance unit includes
First adjustable resistance and the second adjustable resistance；The sacrificial anode simulation current potential includes that the first sacrificial anode simulates current potential and second
Sacrificial anode simulates current potential；
First adjustable resistance and second adjustable resistance are sequentially connected in series the public affairs described with first voltage stabilizing chip
Altogether between the electricity of end；
The current potential output end of first adjustable resistance simulates current potential for exporting the first sacrificial anode；
The current potential output end of second adjustable resistance simulates current potential for exporting the second sacrificial anode.
10. the stray electrical current simulator according to any one of claim 7-9, which is characterized in that further include that signal is inclined
Shift correction mould group；
The signal offset correction mould group provides operating voltage by the power supply mould group；
The output end of the signal offset correction mould group is electrically connected with the input terminal of the output driving mould group.
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|---|---|---|---|
| CN201820999093.7U CN208520906U (en) | 2018-06-27 | 2018-06-27 | Stray electrical current simulator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820999093.7U CN208520906U (en) | 2018-06-27 | 2018-06-27 | Stray electrical current simulator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108548946A (en) * | 2018-06-27 | 2018-09-18 | 广州发展集团股份有限公司 | Stray electrical current simulator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108548946A (en) * | 2018-06-27 | 2018-09-18 | 广州发展集团股份有限公司 | Stray electrical current simulator |
| CN108548946B (en) * | 2018-06-27 | 2023-09-05 | 广州发展集团股份有限公司 | Stray Current Simulator |
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