CN208860902U - A kind of bleeder circuit electrical parameter detection circuit and electric energy computation chip - Google Patents
A kind of bleeder circuit electrical parameter detection circuit and electric energy computation chip Download PDFInfo
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- CN208860902U CN208860902U CN201821384746.7U CN201821384746U CN208860902U CN 208860902 U CN208860902 U CN 208860902U CN 201821384746 U CN201821384746 U CN 201821384746U CN 208860902 U CN208860902 U CN 208860902U
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Abstract
The utility model provides a kind of bleeder circuit electrical parameter detection circuit and electric energy computation chip.The circuit includes: bleeder circuit, including the first divider and the second divider, is coupled to power grid after the two series connection；Reference current source, one end connect the tie point of two divider, and the other end is connected to power ground；Analog-digital converter is connected in parallel with the second divider, and the voltage at the second divider both ends is converted into digital voltage signal and is sent to signal processor；Detection circuit is connected in parallel with reference current source, and open circuit signaling is sent to signal processor when detecting the output voltage of reference current source, and opening a way based on output voltage determinating reference current source；Signal processor carries out processing to the digital voltage signal received and realizes electrical energy measurement and fault detection, and makes and timely responding to the open circuit signaling received.The utility model does not depend on special process, and only increasing detection circuit can be solved by the problem of reference current source open circuit leads to electric energy error count amount in voltage self-calibration circuit.
Description
Technical field
The utility model relates to asic (Application Specific Integrated Circuit, integrated circuit sets
System) technical field, and in particular to a kind of bleeder circuit electrical parameter detection circuit and electric energy computation chip.
Background technique
In intelligent electric meter field, measuring accuracy and reliability are most important, and the shadow that this is directly detected by voltage and current
It rings, the detection of voltage generally uses bleeder circuit, and current detecting generally uses copper-manganese, current transformer etc..
In practical applications, it by such environmental effects, such as temperature, high current, electromagnetic field etc., is easy to make bleeder circuit
Parameter changes, and voltage measurement is caused error occur, eventually leads to electric energy metering error, therefore monitor bleeder circuit in real time
Parameter guarantees that measuring accuracy defines problem nowadays in the urgent need to address in the model of permission.
Utility model content
The utility model embodiment is designed to provide a kind of bleeder circuit electrical parameter detection circuit and electric energy computation chip,
To solve the problems, such as to lead to electric energy error count amount by reference current source open circuit in voltage self-calibration circuit.
The utility model embodiment provides a kind of bleeder circuit electrical parameter detection circuit, comprising:
Coupling after bleeder circuit, including the first divider, the second divider, first divider and the series connection of the second divider
Close power grid；
Reference current source, one end connect the tie point of first divider and the second divider, and the other end is connected to electricity
Source；
Analog-digital converter is connected in parallel with second divider, and the voltage at second divider both ends is converted into
Digital voltage signal is sent to signal processor；
Detection circuit is connected in parallel with the reference current source, for detecting the output voltage of the reference current source, and
When determining that the reference current source is opened a way based on the output voltage, open circuit signaling is sent to the signal processor；
The signal processor carries out processing to the digital voltage signal received and realizes that electrical energy measurement and failure are examined
It surveys, and the open circuit signaling received is made and is timely responded to.
Further, first divider includes resistance R1, and one end of the resistance R1 is connected to the power grid, another
End is connected to second divider.
Further, second divider includes resistance R2, and one end of the resistance R2 is connected to the another of the R1
End, the other end of the resistance R2 are connected to the power ground.
Further, second divider further includes capacitor C1, and the capacitor C1 is connected in parallel with the resistance R2.
Further, the detection circuit includes filter, and the filter is for being filtered the output voltage.
Further, the signal processor includes alarm, the alarm when the reference current source is opened a way into
Row alarm.
Further, the reference current frequency that the reference current source generates is different from the mains frequency and is not described
The integral multiple of mains frequency.
The utility model embodiment also provides a kind of electric energy computation chip, comprising:
Reference current source, one end connect the tie point of the first divider and the second divider, the other end and the second divider
The other end be connected to power ground together；Second divider and first divider are coupled to power grid；
Analog-digital converter is connected in parallel with the second divider, and the voltage of second divider of measurement is converted into counting
Word voltage signal is sent to signal processor；
Detection circuit is connected in parallel with the reference current source, for detecting the output voltage of the reference current source, and
When determining that the reference current source is opened a way based on the output voltage, open circuit signaling is sent to the signal processor；
The signal processor carries out processing to the digital voltage signal received and realizes that electrical energy measurement and failure are examined
It surveys, and the open circuit signaling received is made and is timely responded to.
Further, the detection circuit includes filter, and the filter is for being filtered the output voltage.
Further, the signal processor includes alarm, the alarm when the reference current source is opened a way
It alarms under the control of the signal processor.
The technical solution that the embodiments of the present invention provide, does not depend on specific technique, does not increase system cost additionally,
Only it can solve the problems, such as to lead to error count amount by reference current source open circuit in voltage self-calibration circuit by increasing detection circuit.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of bleeder circuit electrical parameter detection circuit composition schematic diagram that an embodiment of the present invention provides；
Fig. 2 is a kind of bleeder circuit electrical parameter detection circuit composition schematic diagram that another embodiment of the utility model provides；
Fig. 3 is a kind of electric energy computation chip composition schematic diagram that an embodiment of the present invention provides；
Fig. 4 is a kind of electric energy computation chip composition schematic diagram that another embodiment of the utility model provides.
Specific embodiment
To keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, below with reference to attached drawing and reality
Example is applied, the specific embodiment progress of technical solutions of the utility model in further detail, is clearly illustrated.However, being described below
Specific embodiment and embodiment be for illustrative purposes only, rather than limitations of the present invention.It only contains this
Utility model a part of the embodiment, instead of all the embodiments, various changes of the those skilled in the art for the utility model
Change the other embodiments obtained, fall within the protection scope of the utility model.
Although it should be understood that the first, second, third, etc. term can be used in this article be used to describe various elements or
Component, but these elements or component should not be limited by these terms.These terms only to distinguish an element or component with
Another element or component.Therefore, the first element or component of following the discussion, holds within the utility model not departing from, can quilt
Referred to as second element or the second component.
Fig. 1 is a kind of bleeder circuit electrical parameter detection circuit composition schematic diagram that an embodiment of the present invention provides, including
Bleeder circuit, reference current source 12, analog-digital converter 13, detection circuit 14, signal processor 15.
Bleeder circuit includes the first divider 111, the second divider 112, the first divider 111 and the second divider 112
It is coupled to power grid after series connection.The tie point of one end connection the first divider 111 and the second divider 112 of reference current source 12,
The other end is connected to power ground.Analog-digital converter 13 is connected in parallel with the second divider 112, by 112 both ends of the second divider
Voltage is converted into digital voltage signal and is sent to signal processor 15.Detection circuit 14 is connected in parallel with reference current source 12, is used for
When detecting the output voltage of reference current source 12, and being opened a way based on output voltage determinating reference current source 12, open circuit is believed
Number it is sent to signal processor 15.Signal processor 15 carries out processing to the digital voltage signal received and realizes electrical energy measurement and event
Barrier detection, and the open circuit signaling received is made and is timely responded to.
The reference current frequency that reference current source generates is different from mains frequency and is not the integral multiple of mains frequency.
First divider 111, the second divider 112 include but is not limited to resistance, capacitor, inductance and their combination shape
Formula.
In the present embodiment, the first divider 111 includes resistance R1, and one end of resistance R1 is connected to power grid, and the other end connects
It is connected to the second divider 112.Second divider 112 includes resistance R2, and one end of resistance R2 is connected to the other end of resistance R1, electricity
The other end of resistance R2 is connected to power ground.
Since mains frequency f0 is generally 50Hz or 60Hz, reference current source generates the benchmark alternating current that a frequency is f1
Itest is flowed, f1 is generally higher than f0 and is not the integral multiple of f0, because of f0 and f1 different frequencies, it is possible to think grid line L and N
To Itest short circuit, Itest is connected in parallel with R1, R2.
This bleeder circuit electrical parameter detection circuit has voltage self-calibration function.The second partial pressure that analog-digital converter 13 detects
The voltage Vtest of device 112 includes two parts, and a part is partial pressure of the power network current on the second divider 112, and another part is
Partial pressure of the reference current source 12 on the second divider 112.
The voltage Vtest of second divider 112 of measurement is converted into digital voltage signal and is sent to letter by analog-digital converter 13
Number processor 15.The size that signal processor 15 comes out the constituents extraction that frequency in Vtest is f0 to determine voltage net voltage
And its intrinsic standoff ratio, the constituents extraction of frequency f1 is come out to the intrinsic standoff ratio to determine reference current source 12, the two intrinsic standoff ratio is compared
Compared with Lai Jinhang voltage self calibration determines whether circuit parameter is changed.If there is no variation, signals for circuit parameter
Processor 15 continues electrical energy measurement, if circuit parameter is changed, signal processor 15 carries out subsequent processing, in electricity
Road carries out electrical energy measurement after operating normally again.
Electric current self calibration theory is invariable based on reference current source.Once but reference current source 12 is opened a way
The case where when, it will cause system to think that R1 changes to the value of very little, thus will measurement voltage calibration to very big value, this is in electricity
In meter amount, most intuitive result is exactly that will lead to the excessive charging of ammeter, brings loss to user.In addition, current source open circuit will
Uncontrollable damage can be caused to system.
Then, in the present embodiment, detection circuit 14 detects the output voltage of reference current source 12, once hair
Existing reference current source open circuit, then send open circuit signaling to signal processor 15.Signal processor 15 handles this, solves
Continue to realize voltage self calibration and electrical energy measurement after open-circuit fault.
Fig. 2 is a kind of bleeder circuit electrical parameter detection circuit composition schematic diagram that another embodiment of the utility model provides, packet
Include bleeder circuit, reference current source 22, analog-digital converter 23, detection circuit 24, signal processor 25.
Bleeder circuit includes the first divider 211, the second divider 212, the first divider 211 and the second divider 212
It is coupled to power grid after series connection.The tie point of one end connection the first divider 211 and the second divider 212 of reference current source 22,
The other end is connected to power ground.Analog-digital converter 23 is connected in parallel with the second divider 212, by 212 both ends of the second divider
Voltage is converted into digital voltage signal and is sent to signal processor 25.Detection circuit 24 is connected in parallel with reference current source 22, is used for
When detecting the output voltage of reference current source 22, and being opened a way based on output voltage determinating reference current source 22, open circuit is believed
Number it is sent to signal processor 25.Signal processor 25 carries out processing to the digital voltage signal received and realizes electrical energy measurement and event
Barrier detection, and the open circuit signaling received is made and is timely responded to.
The reference current frequency that reference current source generates is different from mains frequency and is not the integral multiple of mains frequency.
First divider 211, the second divider 212 include but is not limited to resistance, capacitor, inductance and their combination shape
Formula.
In the present embodiment, the first divider 211 includes resistance R1.One end of resistance R1 is connected to power grid, and the other end connects
It is connected to the second divider 112.Second divider 212 includes resistance R2, capacitor C1.One end of resistance R2 is connected to the another of resistance R1
One end, the other end of resistance R2 are connected to power ground, and capacitor C1 is connected in parallel with resistance R2.Detection circuit 24 includes filter
241, filter 241 is used to be filtered the output voltage of the reference current source of measurement.Signal processor 25 includes alarm
251, alarm 251 is alarmed under the control of signal processor when reference current source 22 is opened a way.
The utility model embodiment is about bleeder circuit, reference current source 22, analog-digital converter 23, detection circuit 24, letter
Bleeder circuit, reference current source 12, modulus in the other parts and above-described embodiment of number specific working principle of processor 25
Converter 13, detection circuit 14, signal processor 15 are identical, repeat no more.
Fig. 3 is a kind of electric energy computation chip composition schematic diagram that an embodiment of the present invention provides, electric energy computation chip
Including reference current source 32, analog-digital converter 33, detection circuit 34, signal processor 35.
32 one end of reference current source connects the tie point of the first divider and the second divider, and the other end is connected to power supply
Ground, the second divider and the first divider are coupled to power grid.Analog-digital converter 33 is connected in parallel with the second divider, will be surveyed
The voltage of second divider of amount is converted into digital voltage signal and is sent to signal processor 35.Detection circuit 34 and reference current source
32 are connected in parallel, and occur for detecting the output voltage of reference current source 32, and based on output voltage determinating reference current source 32
When open circuit, open circuit signaling is sent to signal processor 35.Signal processor 35 handles the digital voltage signal received
It realizes electrical energy measurement and fault detection, and the open circuit signaling received is made and is timely responded to.
The utility model embodiment is about reference current source 32, analog-digital converter 33, detection circuit 34, signal processor
Reference current source 12, analog-digital converter 13, detection circuit in the other parts and above-described embodiment of 35 specific working principles
14, signal processor 15 is identical, repeats no more.
Fig. 4 is a kind of electric energy computation chip composition schematic diagram that an embodiment of the present invention provides, electric energy computation chip
Including reference current source 42, analog-digital converter 43, detection circuit 44, signal processor 45.
42 one end of reference current source connects the tie point of the first divider and the second divider, and the other end is connected to power supply
Ground, the second divider and the first divider are coupled to power grid.Analog-digital converter 43 is connected in parallel with the second divider, will be surveyed
The voltage of second divider of amount is converted into digital voltage signal and is sent to signal processor 45.Detection circuit 44 and reference current source
42 are connected in parallel, and occur for detecting the output voltage of reference current source 42, and based on output voltage determinating reference current source 42
When open circuit, open circuit signaling is sent to signal processor 45.Signal processor 45 handles the digital voltage signal received
It realizes electrical energy measurement and fault detection, and the open circuit signaling received is made and is timely responded to.
Detection circuit 44 includes filter 441, and filter 441 is used to carry out the output voltage of the reference current source of measurement
Filtering.Signal processor 45 includes alarm 451, and alarm 451 is when reference current source is opened a way in the control of signal processor
Under alarm.
The utility model embodiment is about reference current source 42, analog-digital converter 43, detection circuit 44, signal processor 45
Reference current source 12, analog-digital converter 13, detection circuit 14 in the other parts and above-described embodiment of specific working principle,
Signal processor 15 is identical, repeats no more.
It should be noted that each embodiment above by reference to described in attached drawing is only to illustrate the utility model rather than limits
The scope of the utility model processed, those skilled in the art should understand that, in the spirit and model for not departing from the utility model
The modification or equivalent replacement carried out under the premise of enclosing to the utility model, should all cover within the scope of the utility model.
In addition, signified outer unless the context, the word occurred in the singular includes plural form, and vice versa.In addition, except non-specifically
Illustrate, then any embodiment all or part of in combination with any other embodiment all or part of come using.
Claims (10)
1. a kind of bleeder circuit electrical parameter detection circuit, which is characterized in that the bleeder circuit electrical parameter detection circuit includes:
It is coupled to after bleeder circuit, including the first divider, the second divider, first divider and the series connection of the second divider
Power grid；
Reference current source, one end connect the tie point of first divider and the second divider, and the other end is connected to power ground；
Analog-digital converter is connected in parallel with second divider, and the voltage at second divider both ends is converted into number
Voltage signal is sent to signal processor；
Detection circuit is connected in parallel with the reference current source, for detecting the output voltage of the reference current source, and is based on
When the output voltage determines that the reference current source is opened a way, open circuit signaling is sent to the signal processor；
The signal processor carries out processing to the digital voltage signal received and realizes electrical energy measurement and fault detection,
And the open circuit signaling received is made and is timely responded to.
2. circuit according to claim 1, which is characterized in that first divider includes resistance R1, the resistance R1
One end be connected to the power grid, the other end is connected to second divider.
3. circuit according to claim 2, which is characterized in that second divider includes resistance R2, the resistance R2
One end be connected to the other end of the R1, the other end of the resistance R2 is connected to the power ground.
4. circuit according to claim 3, which is characterized in that second divider further includes capacitor C1, the capacitor
C1 is connected in parallel with the resistance R2.
5. circuit according to claim 1, which is characterized in that the detection circuit includes filter, and the filter is used
It is filtered in the output voltage.
6. circuit according to claim 1, which is characterized in that the signal processor includes alarm, the alarm
It alarms under the control of the signal processor in reference current source open circuit.
7. circuit according to claim 1, which is characterized in that the reference current frequency and institute that the reference current source generates
It states mains frequency difference and is not the integral multiple of the mains frequency.
8. a kind of electric energy computation chip, comprising:
Reference current source, one end connect the tie point of the first divider and the second divider, the other end and the second divider it is another
One end is connected to power ground together；Second divider and first divider are coupled to power grid；
Analog-digital converter is connected in parallel with the second divider, and the voltage of second divider of measurement is converted into digital electricity
Pressure signal is sent to signal processor；
Detection circuit is connected in parallel with the reference current source, for detecting the output voltage of the reference current source, and is based on
When the output voltage determines that the reference current source is opened a way, open circuit signaling is sent to the signal processor；
The signal processor carries out processing to the digital voltage signal received and realizes electrical energy measurement and fault detection,
And the open circuit signaling received is made and is timely responded to.
9. electric energy computation chip according to claim 8, which is characterized in that the detection circuit includes filter, described
Filter is for being filtered the output voltage.
10. electric energy computation chip according to claim 8, which is characterized in that the signal processor includes alarm, institute
Alarm is stated to alarm when the reference current source is opened a way.
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| CN201821384746.7U CN208860902U (en) | 2018-08-27 | 2018-08-27 | A kind of bleeder circuit electrical parameter detection circuit and electric energy computation chip |
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| CN201821384746.7U CN208860902U (en) | 2018-08-27 | 2018-08-27 | A kind of bleeder circuit electrical parameter detection circuit and electric energy computation chip |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458600A (en) * | 2020-05-06 | 2020-07-28 | 白有华 | 5G communication cable fault detection system |
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2018
- 2018-08-27 CN CN201821384746.7U patent/CN208860902U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458600A (en) * | 2020-05-06 | 2020-07-28 | 白有华 | 5G communication cable fault detection system |
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