CN202196106U - Antistealing-electricity digital single-phase ammeter - Google Patents
Antistealing-electricity digital single-phase ammeter Download PDFInfo
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- CN202196106U CN202196106U CN2011203469569U CN201120346956U CN202196106U CN 202196106 U CN202196106 U CN 202196106U CN 2011203469569 U CN2011203469569 U CN 2011203469569U CN 201120346956 U CN201120346956 U CN 201120346956U CN 202196106 U CN202196106 U CN 202196106U
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- electricity
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- ammeter
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Abstract
The utility model discloses an antistealing-electricity digital single-phase ammeter, including a single-phase ammeter and a power measure chip. The power measure chip includes two Delta (Sigma) analog-to-digital converters, a power calculating module, an electric energy to frequency converter and a serial interface. The power measure chip is provided with three analog-to-digital conversion channels, wherein one channel is a voltage detection channel for detecting the L-N voltage of single-phase electricity, and the other two channels are respectively a current detection channel I for detecting a live wire and a current detection channel II for detection a zero wire. Compared to a common pulse-type ammeter, in the ammeter provided in the utility model, an antistealing-electricity function is provided, electricity-stealing of an electricity consumer can be effected detected, reactive power can be detected, a power factor can be reported, the electricity usage condition of the electricity consumer can be monitored, regular improvement to a too low power factor condition can be required, unnecessary conductor loss of a power supply circuit can be reduced, electricity metering is more accurate, an MCU can be externally connected, and time sharing electricity charge rates are easy to realize.
Description
Technical field
The utility model relates to electric quantity metering device, specifically is to be applicable to the networking requirement of national grid to single-phase ammeter, has the single-phase ammeter of anti-stealing electricity function.
Background technology
Traditional ammeter is a mechanical type aluminium dish ammeter, and this ammeter cost is high, and power consumption is big, and precision is low, poor linearity, and the table body weight has noise, function singleness, eliminate in market.
Replacement article once are to use the single-phase effective power meter electrometer of simple IC design, and this ammeter adopts digit pulse counting head to indicate electric weight.It has solved most of shortcoming of aluminium disc type ammeter, and national grid was also once promoted it as main force's ammeter.
Along with development of technology, the shortcoming of this digit pulse formula ammeter also displays: it does not have digital communication interface, and upper strata MCU readout power is inconvenient; It can only calculate active power, can not calculate reactive power; The reason of hardware makes it can not possess anti-stealing electricity function.
The utility model content
To the problems referred to above, the utility model aims to provide a kind of anti-electricity-theft measuring ability of realizing, can measure the effective value of current/voltage, measures the single-phase ammeter of active power, reactive power and applied power.
For realizing this technical purpose; The scheme of the utility model is: the single-phase ammeter of a kind of anti-electricity-theft numeral; Comprise a single-phase ammeter body and a power measurement chip, said power measurement chip comprises two Δ ∑ analog to digital converters, power computation module, electric energy to frequency converter and a serial line interface; Said power measurement chip is provided with three tunnel analog to digital conversion passages, and one the tunnel is the voltage detecting passage that is used for detecting the L-N voltage of single-phase electricity, and two-way is respectively current detecting one that detects live wire and the current detecting two that detects zero line in addition.
As preferably, said power measurement chip also is built-in with reference voltage source and temperature sensor.
Compare with normal pulsed formula ammeter, this novel ammeter can be supported anti-stealing electricity function, can effectively detect the user and steal electricity consumption, reports power supply administration, for country reduces a large amount of losses; Can also detect reactive power, report power factor, so power supply administration can monitor the electricity consumption situation of electricity consumer, meet the low excessively user of power factor, require its regular improvement, reduce the unnecessary conductor losses of feed circuit; In addition, the electricity metering is more accurate, and external MCU realizes timesharing electricity charge rate easily.
Description of drawings
Fig. 1 is the theory structure block diagram of the utility model.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is explained further details.
The single-phase ammeter of anti-electricity-theft numeral of the utility model specific embodiment; Comprise a single-phase ammeter body and a power measurement chip, said power measurement chip comprises two Δ ∑ analog to digital converters, power computation module, electric energy to frequency converter and a serial line interface; Said power measurement chip is provided with three tunnel analog to digital conversion passages, and one the tunnel is the voltage detecting passage that is used for detecting the L-N voltage of single-phase electricity, and two-way is respectively current detecting one that detects live wire and the current detecting two that detects zero line in addition.The power measurement chip also is built-in with reference voltage source and temperature sensor, and is as shown in Figure 1.
Optimum implementation is following:
In the most preferred embodiment; As shown in Figure 1; The single-phase ammeter metered scheme that single-phase ammeter adopts the CS5464 of CirrusLogic company to design, CS5464 is a complete power measurement chip that comprises two Δ ∑ analog-digital converters (ADC), power calculation function, electric energy to a frequency converter and a serial line interface.It can measuring voltage, electric current with calculate Irms, Vrms, instantaneous power, active power, reactive power, power factor.
With reference to accompanying drawing 1, CS5464 has three road ADC passages, and one the tunnel is voltage channel, is used for detecting the L-N voltage of single-phase electricity; In order to realize anti-electricity-theft detection, can use other two-way ADC to detect the electric current of live wire (L) and zero line (N) respectively, when the ADC of two-way current channel value has not simultaneously, get maximum value calculation, and report electrical network to have stealing to take place.CS5464 can use shunt or mutual inductor measurement electric current cheaply, uses divider resistance or voltage measuring transformer voltage.
A voltage signal ripple is imported at voltage channel input pin VIN ± two ends, amplifies through the beneficial amplifier of 10 multiplications, comes digitizing through 2nd Δ ∑ modulator again.Simultaneously; A voltage signal ripple is imported at the positive and negative two ends of current channel input pin I in; Be to adapt to the input voltage of varying level, current channel is integrated with a programmable-gain amplifier (PGA), make the incoming level full scale may be selected to be ± 250mVrms or ± 50mVrms.Come digitizing through 4th Δ ∑ modulator again.Two voltage datas that are used for calculating are from same difference input pin.
Three pins of CS5464 output able to programme export respectively meritorious, idle pulse, and meritorious and idle direction.CS5464 also has SOC(system on a chip) calibration function easily.Have temperature sensor, voltage descends and detects the phase compensation function.
The functional parameter of single-phase ammeter metering module:
1, the energy data linearity: at 1000: 1 dynamic range internal linear degree was ± 0.1%
2, can measure instantaneous voltage Vrms, electric current I rms and power: meritorious, idle, applied power
3, has electric energy-pulses switch function
4, current failure and voltage falling measuring ability
5, has system calibration and phase compensation
6, has temperature sensor
7, meet IEC, ANSI, JIS industrial standard
8, power consumption: 25mW (VA=+5V, VD=+5V); 15mW (VA=+5V, VD=+3.3V)
9, integrated 2.5V reference voltage (maximum temperature is floated 25ppm/ ℃)
Compare with normal pulsed formula ammeter, this novel ammeter can be supported anti-stealing electricity function, can effectively detect the user and steal electricity consumption, reports power supply administration, for country reduces a large amount of losses; Can also detect reactive power, report power factor, so power supply administration can monitor the electricity consumption situation of electricity consumer, meet the low excessively user of power factor, require its regular improvement, reduce the unnecessary conductor losses of feed circuit; In addition, the electricity metering is more accurate, and external MCU realizes timesharing electricity charge rate easily.
The individual event ammeter of the utility model possesses digital interface, is convenient to upper strata MCU reading of data and reports power supply administration.Computation chip integrated temperature sensor, but compensate for temperature drift improve precision; Simultaneously it also can directly drive the digit pulse gauge outfit and indicates meritorious, idle and the electric weight direction.Surmount the national grid stipulations requirement new to single-phase ammeter.
The above is merely this novel preferred embodiment; Not in order to restriction the utility model; Every technical spirit according to the utility model to any trickle modification that above embodiment did, be equal to replacement and improve, all should be included within the protection domain of the utility model technical scheme.
Claims (2)
1. the single-phase ammeter of anti-electricity-theft numeral comprises a single-phase ammeter body and a power measurement chip, it is characterized in that: said power measurement chip comprises two Δ ∑ analog to digital converters, power computation module, electric energy to frequency converter and a serial line interface; Said power measurement chip is provided with three tunnel analog to digital conversion passages, and one the tunnel is the voltage detecting passage that is used for detecting the L-N voltage of single-phase electricity, and two-way is respectively current detecting one that detects live wire and the current detecting two that detects zero line in addition.
2. the single-phase ammeter of numeral according to claim 1 is characterized in that: said power measurement chip also is built-in with reference voltage source and temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203469569U CN202196106U (en) | 2011-09-15 | 2011-09-15 | Antistealing-electricity digital single-phase ammeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203469569U CN202196106U (en) | 2011-09-15 | 2011-09-15 | Antistealing-electricity digital single-phase ammeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202196106U true CN202196106U (en) | 2012-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203469569U Expired - Fee Related CN202196106U (en) | 2011-09-15 | 2011-09-15 | Antistealing-electricity digital single-phase ammeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202196106U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389397A (en) * | 2013-07-23 | 2013-11-13 | 国家电网公司 | Anti-cheating system for photovoltaic power generation |
| CN103513222B (en) * | 2013-10-15 | 2017-04-12 | 国网河北省电力公司邯郸供电分公司 | Ammeter rapid stealing detecting instrument |
-
2011
- 2011-09-15 CN CN2011203469569U patent/CN202196106U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389397A (en) * | 2013-07-23 | 2013-11-13 | 国家电网公司 | Anti-cheating system for photovoltaic power generation |
| CN103389397B (en) * | 2013-07-23 | 2015-06-17 | 国家电网公司 | Anti-cheating system for photovoltaic power generation |
| CN103513222B (en) * | 2013-10-15 | 2017-04-12 | 国网河北省电力公司邯郸供电分公司 | Ammeter rapid stealing detecting instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120418 Termination date: 20150915 |
|
| EXPY | Termination of patent right or utility model |