CN108414817A - A kind of integrated circuit of high-precision measuring electricity consumption and electrical leakage - Google Patents
A kind of integrated circuit of high-precision measuring electricity consumption and electrical leakage Download PDFInfo
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- CN108414817A CN108414817A CN201810152332.XA CN201810152332A CN108414817A CN 108414817 A CN108414817 A CN 108414817A CN 201810152332 A CN201810152332 A CN 201810152332A CN 108414817 A CN108414817 A CN 108414817A
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- 238000001514 detection method Methods 0.000 claims abstract description 30
- 238000005070 sampling Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000003321 amplification Effects 0.000 claims abstract description 10
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 10
- 238000010586 diagram Methods 0.000 description 6
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- 240000002853 Nelumbo nucifera Species 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
A kind of integrated circuit of high-precision measuring electricity consumption and electrical leakage.A kind of integrated circuit for detection circuit voltage, it includes and is integrated with voltage detecting electric signal amplifier, current detecting electric signal amplifier, the chip of microprocessor with memory, voltage signal and current signal processing routine are provided in microprocessor, it is characterized in that being provided with current correction processing routine in microprocessor, on two signal input pins of current detecting electric signal amplifier and connect a low resistance current sampling resistor, then a normalized current is applied on the low resistance current sampling resistor, the signal input part of current detecting electric signal amplifier is set to obtain a detection signal, after detection signal amplification after the voltage signal of microprocessor and current signal routine processes again by current correction processing routine after form a correcting current value and on the memory that is solidificated in microprocessor.Compared with the prior art invention, has the advantages that current detection accuracy is high, it is in safeguard protection to can be used for, multiduty.
Description
Technical field
The present invention relates to a kind of power transmission protection technologies.
Background technology
Current detecting in the existing integrated circuit for detection circuit voltage is by acquiring concatenation on the power line
Specific resistance value resistance both ends voltage signal, then amplified by amplifying circuit inside integrated circuit, using micro-
Processor processing forms an output current signal to realize, this kind of integrated circuit, controls program and corresponding parameter is producing
When integrated circuit, have been fastened to inside the microprocessor inside integrated circuit, in use, going here and there on the power line as requested
The resistance of specific resistance value is connect, then resistance both ends signal input part corresponding with integrated circuit is connected.Due to being concatenation
On the power line, therefore, the resistance value of resistance is very little, and the resistance of resistance value very little, resistance value are it is difficult to ensure that it is smart
Exactness causes in actual use, and the application condition of detected next electric current is big.
Invention content
The goal of the invention of the present invention is to provide a kind of current detection accuracy the high integrated electricity for detection circuit voltage
Road.
The solution of the present invention one is achieved in that including being integrated with voltage detecting electric signal amplifier, current detecting electricity
The chip of signal amplifier, microprocessor with memory, memory is built in inside chip or external outside chip, microprocessor
It is provided with voltage signal and current signal processing routine in device, is particular in that in microprocessor and is provided at current correction
Program is managed, on two signal input pins of current detecting electric signal amplifier and connects a low resistance current sampling resistor, then will
One normalized current is applied on the low resistance current sampling resistor, and the signal input part of current detecting electric signal amplifier is made to obtain
One detection signal, the detection signal amplification after after the voltage signal of microprocessor and current signal routine processes again by
A correcting current value is formed after current correction processing routine and on the memory that is solidificated in microprocessor.
The solution of the present invention two is achieved in that including being integrated with voltage detecting electric signal amplifier, current detecting electricity
First chip of signal amplifier, first microprocessor with memory is provided with voltage signal and electric current letter in microprocessor
Number processing routine, is particular in that and is provided with the second microprocessor that is with memory and being provided with current correction processing routine
Device chip, memory is built in the second microprocessor chip the inside or external outside the second microprocessor chip, in current detecting
On two signal input pins of electric signal amplifier and a low resistance current sampling resistor is connect, a normalized current is then applied to this
On low resistance current sampling resistor, the signal input part of current detecting electric signal amplifier is made to obtain a detection signal, the detection
After signal amplification a current signal is formed after the voltage signal of first microprocessor and current signal routine processes simultaneously
It is transferred to the second microprocessor chip and forms correction after the current correction routine processes in the second microprocessor chip
Current value is simultaneously solidificated on the memory of the second microprocessor chip.
In use, on the power line by the low resistance current sampling resistor concatenation of the integrated circuit of the present invention, the resistance institute
The electric signal of detection obtains a current value A after overvoltage signal and current signal routine processes, and current value A passes through
After the correction of current correction processing routine, the current value A*B/C after being corrected, the value is the current value on power cord,
Middle B is standard current value, and C is correcting current value.Due to before use, low resistance current sampling resistor have been subjected to normalized current into
Row correction, therefore, even if the resistance value of the low resistance current sampling resistor in different integrated circuits differs greatly, nor affects on
The accuracy of integrated circuit detection power lead current of the present invention.And the voltage value of power supply is detected, due to the resistance of used resistance
Value is prodigious, is to be easier to obtain the big resistance of higher this kind of resistance value of ratio of precision, to not influence voltage therefore
Accurate detection.
It is because some are integrated with voltage detecting electric signal amplifier, electric current using the second microprocessor of alternative plan
The chip for detecting electric signal amplifier, microprocessor with memory, after producing, voltage signal and current signal processing
Program is cannot to change, moreover, do not allow in addition input control program and data in microprocessor yet, in this case,
Just solves the problems, such as this using the second microprocessor.
It is provided with the power cord that two stocks are not connected with load and power supply, current transformer is socketed on two strands of power cords,
Two output ends of current transformer are connected by amplifier with the input of the electric signal of microprocessor.
When work, when current transformer has electric current output, illustrate to there are drain conditions to occur and the electricity that leads to two strands of power cords
Flow it is of different sizes, and pass through microprocessor export an alarm signal prompt alarm.
Alternatively, being integrated with a voltage detecting electric signal amplifier, two current detecting electric signal amplifiers, carrying memory
Microprocessor chip in two current detecting electric signal amplifiers the two signal input pins low-resistance different from two respectively
Value current sampling resistor simultaneously connects.
When work, two stocks not from the connected power cord of load and power supply respectively with different low resistance current sampling resistors
Concatenation, when the electric current difference of the two strands of power cords detected, illustrate to have drain conditions generation and the electric current that leads to two strands of power cords
It is of different sizes, and alarm signal prompt alarm is exported by microprocessor.
One switching circuit for carrying relay is set, and power cord is connected by the switch of relay with load, microprocessor
Control signal output by switching circuit control the actuating of relay, two signal input pins of current detecting electric signal amplifier
It is connected on the electrode plate of the switch of relay, the electrode plate between two signal input pins forms low resistance current sampling resistor.
In this way, when having drain conditions generation or overload power utilization, according to setting program, exported by microprocessor
Signal control relay action is controlled, by electric power disconnection.
The present invention compared with the prior art, have current detection accuracy is high, it is in safeguard protection, multiduty to can be used for
Advantage.
Description of the drawings：
Fig. 1 is the structural schematic diagram of the embodiment of the present invention 1；
Fig. 2 is the structural schematic diagram of the embodiment of the present invention 2；
Fig. 3 is the structural schematic diagram of the embodiment of the present invention 3；
Fig. 4 is the structural schematic diagram of the embodiment of the present invention 4；
Fig. 5 is current correction schematic diagram；
Fig. 6 is voltage correction schematic diagram.
Specific implementation mode：
The present invention is described in further detail in conjunction with drawings and examples：
Embodiment 1：As shown in Figure 1, the present invention is including being integrated with voltage detecting electric signal amplifier 1, current detecting electric signal is put
The chip a of big device 2, microprocessor 3 with memory is provided with voltage signal and current signal processing routine in microprocessor 3,
Communication port s is carried on chip a, to carry out data exchange with the external world, is particular in that in microprocessor 3 and is provided with electricity
Correction process program is flowed, on two signal input pins of current detecting electric signal amplifier 2 and connects a low resistance current sample electricity
R is hindered, then as shown in figure 5, by corrector i by a normalized current B（Including High-precision standard DC current and High-precision standard
Alternating current）It is applied on low resistance current sampling resistor R, and the working power vcc of chip a is provided by corrector i, make
The signal input part of current detecting electric signal amplifier 2 obtains a detection signal, by microprocessor 3 after detection signal amplification
Voltage signal and current signal routine processes after again by forming a correcting current value C after current correction processing routine and leading to
The correction that overcorrect device i is output to chip a determines that control signal makes correcting current value C be solidificated in the memory in microprocessor 3
On.
In use, the low resistance current sampling resistor R of the integrated circuit of the present invention is serially connected in power cord（Firewire L or
Zero curve O）On, one power circuit d driving chips a work of setting, the electric signal that resistance R is detected is through overvoltage signal and electric current
After signal handler processing, a current value A is obtained, current value A obtains school after the correction of current correction processing routine
Current value A*B/C after just, the value are the current value on power cord, which is input on display equipment e
It can intuitively show that real-time current, wherein B are standard current values, C is correcting current value.When needing to detect voltage, according to setting
Provisioning request connects one group of resistance group Ra for carrying voltage sample resistance R1, voltage inspection between fire-wire power line and zero curve power cord
The both ends that 1 liang of signal input pin of electric signal amplifier is attempted by voltage sample resistance R1 are surveyed, voltage detecting electric signal amplifier 1 is made
Signal input part obtain one detection signal, the detection signal amplification after by microprocessor 3 voltage signal and current signal
After routine processes, as soon as output voltage value electronic signal, which is input on display equipment e can be intuitive
Ground shows real-time voltage.
Here, resistance group Ra is concatenated in advance, voltage sample resistance R1 is then attempted by the amplification of voltage detecting electric signal
On 1 liang of signal input pin of device, then as shown in fig. 6, by voltage corrector n by a normal voltage V（It is straight including High-precision standard
Galvanic electricity is pressed and High-precision standard alternating voltage）It is applied on resistance group Ra, and the work of chip a is provided by voltage corrector n
Power supply vcc makes the signal input part of voltage detecting electric signal amplifier 1 obtain a detection signal, is passed through after detection signal amplification
Cross microprocessor 3 voltage signal and current signal routine processes after again by formed after voltage correction processing routine one correction
Voltage value Vb and the correction that chip a is output to by voltage corrector n determine that control signal makes correction voltage value Vb be solidificated in
On memory in microprocessor 3.In use, resistance group Ra is attempted by L, O on two power cords, voltage sample resistance R1 is detected
Electric signal obtains a voltage value Vi, voltage value Vi is through overvoltage after overvoltage signal and current signal routine processes
After correction process correction to program, the voltage value Vi*Vb/V after being corrected, the value is the voltage value on power cord, the electricity
Pressure value electronic signal, which is input on display equipment e, can intuitively show real-time current.After correction, even if used electricity
Resistance group Ra, the resistance value deviation of voltage sample resistance R1 are larger, nor affect on accurate detection voltage, ensure Electro-metering when application
And other detection controls.Circuit has calibrated electric current and voltage, muddled high-precision measuring electricity consumption and electric leakage simultaneously, is conducive to improve
The level of safety utilization of electric power.
Embodiment 2：As shown in Fig. 2, the present invention includes being integrated with voltage detecting electric signal amplifier 1, current detecting telecommunications
First chip b of number amplifier 2, first microprocessor 4 with memory, be provided in first microprocessor 4 voltage signal and
Current signal processing routine is particular in that and is provided with memory and being provided with current correction processing routine second
Communication port s is carried on microprocessor chip c, the second microprocessor chip c, to carry out data exchange with the external world, in electric current
It detects on two signal input pins of electric signal amplifier 2 and meets a low resistance current sampling resistor R, then by a normalized current B
It is applied on low resistance current sampling resistor R, the signal input part of current detecting electric signal amplifier is made to obtain a detection letter
Number, after detection signal amplification one is formed after the voltage signal of first microprocessor 4 and current signal routine processes
Current signal and be transferred to the second microprocessor chip c and through the current correction processing routine in the second microprocessor chip c at
Correcting current value B is formed after reason and is solidificated on the memory of the second microprocessor chip c.
Embodiment 3：As shown in figure 3, the present embodiment is on the basis of embodiment 1 or 2, be provided with two stocks not with it is negative
Power cord L, O that lotus and power supply are connected, wherein one power cord（The power cord L such as being connect with firewire）With low resistance current sample
Resistance R simultaneously connects, and current transformer M is socketed on two gangs of power cords L, O, and two output ends of current transformer M are by being integrated in core
Amplifier 5 on piece a is connected with the input of the electric signal of microprocessor 3.As shown in figure 5, when correcting current, normalized current is made to export
Power cord passes through current transformer M, in this way, when can obtain electric leakage standard current value B, the induced current D of current transformer M,
In this way, when detecting electric leakage, the amount of energy Accurate Determining electric leakage, the real-time current as current transformer induction obtains is E, then
Electrical leakage quantity is exactly E*B/D, and to judge position and the state of electric leakage according to electrical leakage quantity, further step is taken to facilitate.
One switching circuit 6 for carrying relay J, wherein one power cord are set（The power cord L such as being connect with firewire）It is logical
The switch K for crossing relay J is connected with load, and the control signal output of microprocessor 3 controls relay J by switching circuit 6 and moves
Make, two signal input pins of current detecting electric signal amplifier 2 are connected on the electrode plate 7 of the switch K of relay J, two letters
Electrode plate between number input pin forms low resistance current sampling resistor R.
When work, when current transformer M has electric current output, illustrate to there are drain conditions to occur and the electricity that leads to two strands of power cords
It flows of different sizes, and alarm signal prompt alarm is exported by microprocessor, and according to setting program, pass through microprocessor 3
Output control signal control relay J actions, by electric power disconnection.
Embodiment 4：As shown in figure 4, the present embodiment is on the basis of embodiment 3, be provided with two stocks not with load and
Power supply connected power cord L, O, two gangs of power cords L, O from different low resistance current sampling resistor R concatenations, are integrated with one respectively
The chip a of 1, two current detecting electric signal amplifier 2 of a voltage detecting electric signal amplifier, microprocessor 3 with memory
In two current detecting electric signal amplifiers 2 the two signal input pins low resistance current sampling resistor R different from two respectively
And it connects.
When work, when the electric current difference of the two strands of power cords detected, illustrate there are drain conditions to occur and lead to two strands of electricity
The size of current of source line L, O are different, and export alarm signal prompt alarm by microprocessor 3.And can according to setting program,
The J actions of control signal control relay are exported by microprocessor 3, by electric power disconnection.
Claims (6)
1. a kind of integrated circuit of high-precision measuring electricity consumption and electrical leakage, includes and is integrated with voltage detecting electric signal amplifier, electric current
Detect the chip of electric signal amplifier, microprocessor with memory, memory be built in it is inside chip or external outside chip,
Voltage signal and current signal processing routine are provided in microprocessor, it is characterised in that current correction is provided in microprocessor
Processing routine on two signal input pins of current detecting electric signal amplifier and connects a low resistance current sampling resistor, then
One normalized current is applied on the low resistance current sampling resistor, the signal input part of current detecting electric signal amplifier is made to obtain
A detection signal is obtained, after detection signal amplification after the voltage signal of microprocessor and current signal routine processes again
By on the memory that forms a correcting current value after current correction processing routine and be solidificated in microprocessor.
2. a kind of integrated circuit of high-precision measuring electricity consumption and electrical leakage, including it is integrated with voltage detecting electric signal amplifier, electricity
First chip of stream detection electric signal amplifier, first microprocessor with memory is provided with voltage signal in microprocessor
And current signal processing routine, it is characterised in that it is micro- to be provided with memory and being provided with current correction processing routine second
Processor chips, memory is built in the second microprocessor chip the inside or external outside the second microprocessor chip, in electric current
It detects on two signal input pins of electric signal amplifier and connects a low resistance current sampling resistor, then apply a normalized current
On the low resistance current sampling resistor, the signal input part of current detecting electric signal amplifier is made to obtain a detection signal, it should
Electric current letter is formed after the voltage signal of first microprocessor and current signal routine processes after detection signal amplification
Number and be transferred to the second microprocessor chip and formed after the current correction routine processes in the second microprocessor chip
Correcting current value is simultaneously solidificated on the memory of the second microprocessor chip.
3. the integrated circuit of high-precision measuring electricity consumption and electrical leakage according to claim 1 or 2, it is characterised in that be provided with
The power cord that two stocks are not connected with load and power supply, current transformer are socketed on two strands of power cords, and the two of current transformer
Output end is connected by amplifier with the input of the electric signal of microprocessor.
4. the integrated circuit of high-precision measuring electricity consumption and electrical leakage according to claim 1 or 2, it is characterised in that be integrated with
One voltage detecting electric signal amplifier, two current detecting electric signal amplifiers, the microprocessor with memory carry
Two signal input pins of two current detecting electric signal amplifiers in the chip of the first microprocessor of memory respectively with neither
Low resistance current sampling resistor together simultaneously connects.
5. the integrated circuit of high-precision measuring electricity consumption and electrical leakage according to claim 3, it is characterised in that one band of setting
There are the switching circuit of relay, power cord to be connected with load by the switch of relay, the microprocessor in chip or second
The control signal output of microprocessor chip controls the actuating of relay by switching circuit, current detecting electric signal amplifier
Two signal input pins are connected on the electrode plate of the switch of relay, and the electrode plate between two signal input pins forms low resistance electric current
Sampling resistor.
6. the integrated circuit of high-precision measuring electricity consumption and electrical leakage according to claim 4, it is characterised in that one band of setting
There are the switching circuit of relay, power cord to be connected with load by the switch of relay, the microprocessor in chip or second
The control signal output of microprocessor chip controls the actuating of relay by switching circuit, current detecting electric signal amplifier
Two signal input pins are connected on the electrode plate of the switch of relay, and the electrode plate between two signal input pins forms low resistance electric current
Sampling resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810152332.XA CN108414817A (en) | 2018-02-14 | 2018-02-14 | A kind of integrated circuit of high-precision measuring electricity consumption and electrical leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810152332.XA CN108414817A (en) | 2018-02-14 | 2018-02-14 | A kind of integrated circuit of high-precision measuring electricity consumption and electrical leakage |
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| Publication Number | Publication Date |
|---|---|
| CN108414817A true CN108414817A (en) | 2018-08-17 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810152332.XA Pending CN108414817A (en) | 2018-02-14 | 2018-02-14 | A kind of integrated circuit of high-precision measuring electricity consumption and electrical leakage |
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