CN211630153U - Filter device applied to low-voltage meter reading integrated carrier wave - Google Patents
Filter device applied to low-voltage meter reading integrated carrier wave Download PDFInfo
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- CN211630153U CN211630153U CN201922113410.8U CN201922113410U CN211630153U CN 211630153 U CN211630153 U CN 211630153U CN 201922113410 U CN201922113410 U CN 201922113410U CN 211630153 U CN211630153 U CN 211630153U
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- 238000001914 filtration Methods 0.000 claims abstract description 106
- 239000003990 capacitor Substances 0.000 claims description 50
- 239000000969 carrier Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
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- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model discloses a filtering device applied to low-voltage meter reading carrier waves, which comprises a three-phase signal input module, a protection module and a filtering module; the input end of the three-phase signal input module comprises an A-phase input end, a B-phase input end, a C-phase input end and a zero line end, the protection module comprises a first resistor, a second resistor and a third resistor, and the filtering module comprises a first filtering group, a second filtering group and a third filtering group; one end of the first filtering group is connected with the phase A input end, the other end of the first filtering group is connected with the zero line end, and the first resistor is connected with the first filtering group in parallel; one end of the second filtering group is connected with the phase B input end, the other end of the second filtering group is connected with the zero line end, and the second resistor is connected with the second filtering group in parallel; one end of the third filtering group is connected with the phase-C input end, the other end of the third filtering group is connected with the zero line end, and the third resistor is connected with the third filtering group in parallel. The utility model discloses can effectively filter high-power electrical apparatus harmonic interference.
Description
Technical Field
The utility model relates to a data transmission field particularly, relates to a be applied to low pressure collection and copy filter equipment of table carrier wave.
Background
In a carrier meter reading mode used by a low-voltage meter reading integrated meter for acquiring electric energy data, data acquisition is mainly carried out and transmitted through modulation and demodulation waveforms, and as large-power electric appliances are used by current residential users more and more, particularly in rural areas, the transmission distance is long, the acquisition integrity of the electric energy data of the meter is influenced by the interference of carrier signals, and the most obvious phenomenon is that a lot of electric energy meter data cannot be read normally or the meter reading is interrupted frequently, and the data is lost.
Therefore, a filtering device applied to a low-voltage meter reading carrier wave is needed to solve the problem that the electric energy meter data cannot be normally read or the meter reading is always interrupted or even the data is lost due to the interference of carrier wave signals generated by a high-power electrical appliance of a resident user.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the not enough of prior art, the utility model provides a be applied to the filter equipment of low pressure collection meter reading carrier wave to solve resident user's the produced carrier signal interference's of high-power electrical apparatus problem.
In order to solve the technical problem, the utility model provides a be applied to the filter equipment of low pressure set carrier wave of checking meter, the filter equipment includes signal input module, protection module and filtering module;
the output end of the three-phase signal input module comprises an A-phase input end, a B-phase input end, a C-phase input end and a zero line end, the protection module comprises a first resistor, a second resistor and a third resistor, and the filtering module comprises a first filtering group, a second filtering group and a third filtering group;
one end of the first filtering group is connected with the phase A input end, the other end of the first filtering group is connected with the zero line end, and the first resistor is connected with the first filtering group in parallel;
one end of the second filtering group is connected with the phase B input end, the other end of the second filtering group is connected with the zero line end, and the second resistor is connected with the second filtering group in parallel;
one end of the third filtering group is connected with the phase-C input end, the other end of the third filtering group is connected with the zero line end, and the third resistor is connected with the third filtering group in parallel.
As a preferred technical solution of the present invention, the first filter group includes a first power resistor and a first capacitor, and the first power resistor is connected in parallel with the first capacitor;
the second filtering group comprises a second power resistor and a second capacitor, and the second power resistor is connected with the second capacitor in parallel;
the third filtering group comprises a third power resistor and a third capacitor, and the third power resistor is connected with the third capacitor in parallel.
As an optimized technical solution of the present invention, the first power resistor, the second power resistor and the third power resistor are plug-in power resistors, and the plug-in power resistor model is YAGEO-1M/1W.
As a preferred embodiment of the present invention, the capacitance of the first capacitor, the second capacitor and the third capacitor is 2.2 μ F.
As a preferred technical scheme of the utility model, first electric capacity the second electric capacity and the third electric capacity is plug-in components ann rule electric capacity, plug-in components ann rule electric capacity's model is OKAYA-LE 225-MX.
As an optimized technical scheme of the utility model, first resistance the second resistance and the third resistance is plug-in components piezo-resistor, plug-in components piezo-resistor model is EPCOS-S20K 510.
The utility model provides a be applied to filter equipment of low pressure collection carrier wave of checking meter, the beneficial effect that this green ripples device reaches is: based on the filtering module, the filtering device has the functions of filtering carrier signal interference generated by high-power electric appliances, increasing the low-voltage centralized meter reading automatic meter reading rate of the area by more than 10%, increasing the success rate of monitoring electric energy data of the electric meter in real time by more than 50%, and reducing the operation and maintenance working pressure of an electric energy meter field. After the electric energy meter is used mature, the electric energy meter can be popularized and applied to the whole power industry, and the operation and maintenance level of the electric energy meter is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 shows a schematic structural diagram of a filtering apparatus in an embodiment of the present invention;
fig. 2 shows a working principle diagram of a filtering apparatus in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Fig. 1 shows a schematic structural diagram of a filtering apparatus in an embodiment of the present invention; fig. 2 shows a working principle diagram of a filtering apparatus in an embodiment of the present invention.
The embodiment of the utility model provides a be applied to the filter equipment of low pressure collection meter reading carrier wave, this filter equipment includes three-phase signal input module, protection module and filtering module; the collected carrier signals are transmitted to the filtering module based on the three-phase signal input module, the protection module is responsible for protecting a circuit from overload, the filtering module receives carrier information from the signal input module, then the carrier information with limited frequency is filtered, and the filtered carrier information is output by the filtering module.
Specifically, the output end of the signal input module comprises an a-phase input end, a B-phase input end, a C-phase input end and a zero line end, and a carrier signal is input into each corresponding filter circuit through the a-phase input end, the B-phase input end and the C-phase input end, filtered and returned through the zero line end; the protection module comprises a first resistor RV1, a second resistor RV2 and a third resistor RV3, and a circuit where the protection module is located is protected based on the first resistor RV1, the second resistor RV2 and the third resistor RV 3; the filtering module comprises a first filtering group, a second filtering group and a third filtering group, and based on the first filtering module, the second filtering module and the third filtering module, the filtering module filters and eliminates interference signals of carrier signals of loops of each phase.
One end of the first filtering group is connected with the phase-A input end, the other end of the first filtering group is connected with the zero line end, the first resistor RV1 is connected with the first filtering group in parallel, the first filtering group is connected with the phase-A input end based on the fact that the first filtering group is connected with the phase-A input end, the first filtering group is responsible for filtering interference noise of carrier signals in the phase-A input end, and the processed carrier signals are transmitted out through the zero line end; the circuit of the first filtering group is protected based on the fact that the first resistor RV1 is connected with the first filtering group in parallel.
Further, the first filtering group includes a first power resistor R1 and a first capacitor C1, the first power resistor R1 is connected in parallel with the first capacitor C1, the first capacitor C1 is responsible for filtering noise of a specific frequency of the carrier signal in the a-phase input terminal, and the resistance value of the first power resistor R1 is controlled by the first capacitor C1 based on the fact that the first power resistor R1 is connected in parallel with the first capacitor C1.
One end of the second filtering group is connected with the phase-B input end, the other end of the second filtering group is connected with the zero line end, and the second resistor RV2 is connected with the second filtering group in parallel; based on the connection of the second filtering group and the phase B input end, the second filtering group is responsible for filtering the interference noise of the carrier signal in the phase B input end, and the processed carrier signal is transmitted out through the zero line end; the circuit of the second filtering group is protected based on the fact that the second resistor RV2 is connected with the second filtering group in parallel.
Further, the second filtering group includes a second power resistor R2 and a second capacitor C2, the second power resistor R2 is connected in parallel with the second capacitor C2, the second capacitor C2 is responsible for filtering noise of a specific frequency of the carrier signal in the B-phase input terminal, and the second power resistor R2 is connected in parallel with the second capacitor C2 and is controlled in resistance by the second capacitor C2.
One end of the third filtering group is connected with the phase-C input end, the output end of the third filtering group is connected with the zero line end, the third resistor RV3 is connected with the third filtering group in parallel, and based on the connection of the third filtering group and the phase-C input end, the third filtering group is responsible for filtering the interference noise of the carrier signal in the phase-C input end, and the processed carrier signal is transmitted out through the zero line end; the circuit of the third filtering group is protected based on the parallel connection of the third resistor RV3 and the third filtering group.
Further, the third filtering group includes a third power resistor R3 and a third capacitor C3, the third power resistor R3 is connected in parallel with the third capacitor C3, the third capacitor C3 is responsible for filtering noise of a specific frequency of the carrier signal in the C-phase input terminal, and the third power resistor R3 is connected in parallel with the third capacitor C3 and is controlled in resistance by the third capacitor C3.
Specifically, the first power resistor R1, the second power resistor R2, and the third power resistor R3 are package power resistors, the package power resistor is YAGEO-1M/1W, and the first power resistor R1, the second power resistor R2, and the third power resistor R3 based on the YAGEO-1M/1W package power resistors can receive capacitance control resistance values of respective filter circuits, so as to filter noise with a specific frequency.
In particular, the capacitance of the first capacitor C1, the second capacitor C2 and the third capacitor C3 is 2.2 μ F, the capacitance of the first capacitor C1, the second capacitor C2 and the third capacitor C3 are card-type capacitors, the model of the card-type capacitors is OKAYA-LE225-MX, and the first capacitor C1, the second capacitor C2 and the third capacitor C3 based on the OKAYA-LE225-MX type card-type capacitors can be short-circuited or routed according to the signal frequency in the circuit, so as to eliminate the signal noise of the specific frequency of the film.
Particularly, the first resistor RV1, the second resistor RV2 and the third resistor RV3 are plug-in piezoresistors, the plug-in piezoresistor is of an EPCOS-S20K510 type, and based on the plug-in piezoresistor of the EPCOS-S20K510 type, voltage clamping is performed when overvoltage of each parallel circuit is borne, and redundant current is absorbed to protect each filtering group.
The embodiment of the utility model provides a be applied to filter equipment of low pressure collection meter reading carrier wave, the device is based on first filter group, the second filter group and the third filter group filters the noise signal of specific frequency in each phase circuit, when the signal frequency in a certain circuit is greater than a certain specific value, according to the characteristic that electric capacity leads to high frequency resistance low frequency, the electric capacity circuit of this phase is equivalent to the short circuit, filter out the noise of this frequency with this, when this phase circuit signal is in the low frequency, the electric capacity of this phase circuit is equivalent to the broken circuit, the power resistance that connects in parallel with this electric capacity is gone away to the electric current, but when the frequency continues to rise and surpasss a certain value can cause the impedance decline of resistance when the frequency continues to rise, because the influence of lead wire inductance, total impedance rises, lead wire inductance represents an open circuit or infinite impedance under very high frequency, can regard as a series inductance and the circuit of parallelly connected electric capacity, because the inductance has the characteristic of passing low frequency and high frequency, when the resistance is in a high frequency equivalent mode, the resistance can filter out noise with frequency larger than a certain value, and has no blocking effect on signals with frequency smaller than a certain limit, thereby ensuring high-quality communication of carrier signals and improving the meter reading success rate of the metering automation system.
In addition, the above explanation of the filtering device provided by the embodiment of the present invention should be only used to help understand the method and the core idea of the present invention, and a specific example should be adopted herein to explain the principle and the implementation manner of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (6)
1. A filtering device applied to low-voltage meter reading integrated carriers is characterized by comprising a three-phase signal input module, a protection module and a filtering module;
the output end of the three-phase signal input module comprises an A-phase input end, a B-phase input end, a C-phase input end and a zero line end, the protection module comprises a first resistor, a second resistor and a third resistor, and the filtering module comprises a first filtering group, a second filtering group and a third filtering group;
one end of the first filtering group is connected with the phase A input end, the other end of the first filtering group is connected with the zero line end, and the first resistor is connected with the first filtering group in parallel;
one end of the second filtering group is connected with the phase B input end, the other end of the second filtering group is connected with the zero line end, and the second resistor is connected with the second filtering group in parallel;
one end of the third filtering group is connected with the phase-C input end, the other end of the third filtering group is connected with the zero line end, and the third resistor is connected with the third filtering group in parallel.
2. The filtering device applied to the low-voltage meter reading carrier wave according to claim 1, wherein the first filtering group comprises a first power resistor and a first capacitor, and the first power resistor is connected with the first capacitor in parallel;
the second filtering group comprises a second power resistor and a second capacitor, and the second power resistor is connected with the second capacitor in parallel;
the third filtering group comprises a third power resistor and a third capacitor, and the third power resistor is connected with the third capacitor in parallel.
3. The filtering device applied to a low-voltage meter reading carrier wave according to claim 2, wherein the first power resistor, the second power resistor and the third power resistor are plug-in power resistors, and the plug-in power resistors are YAGEO-1M/1W in model.
4. The filter device applied to the low-voltage meter reading carrier wave according to claim 2, wherein the capacitance of the first capacitor, the second capacitor and the third capacitor is 2.2 μ F.
5. The filtering device applied to the low-voltage meter reading carrier wave according to claim 4, wherein the first capacitor, the second capacitor and the third capacitor are plug-in safety capacitors, and the plug-in safety capacitors are OKAYA-LE 225-MX.
6. The filtering device applied to the low-voltage meter reading carrier wave according to claim 1, wherein the first resistor, the second resistor and the third resistor are plug-in piezoresistors, and the plug-in piezoresistors are EPCOS-S20K 510.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922113410.8U CN211630153U (en) | 2019-11-30 | 2019-11-30 | Filter device applied to low-voltage meter reading integrated carrier wave |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922113410.8U CN211630153U (en) | 2019-11-30 | 2019-11-30 | Filter device applied to low-voltage meter reading integrated carrier wave |
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| Publication Number | Publication Date |
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| CN211630153U true CN211630153U (en) | 2020-10-02 |
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| CN201922113410.8U Expired - Fee Related CN211630153U (en) | 2019-11-30 | 2019-11-30 | Filter device applied to low-voltage meter reading integrated carrier wave |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113964832A (en) * | 2021-11-01 | 2022-01-21 | 青岛鼎信通讯股份有限公司 | Topology for reducing influence of power quality equipment on carrier meter reading |
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2019
- 2019-11-30 CN CN201922113410.8U patent/CN211630153U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113964832A (en) * | 2021-11-01 | 2022-01-21 | 青岛鼎信通讯股份有限公司 | Topology for reducing influence of power quality equipment on carrier meter reading |
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Granted publication date: 20201002 |