CN203084038U - Circular single-phase LCD (Liquid Crystal Display) watt-hour meter - Google Patents
Circular single-phase LCD (Liquid Crystal Display) watt-hour meter Download PDFInfo
- Publication number
- CN203084038U CN203084038U CN 201320079540 CN201320079540U CN203084038U CN 203084038 U CN203084038 U CN 203084038U CN 201320079540 CN201320079540 CN 201320079540 CN 201320079540 U CN201320079540 U CN 201320079540U CN 203084038 U CN203084038 U CN 203084038U
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- circuit
- electric energy
- energy meter
- watt
- hour meter
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Abstract
The utility model provides a circular single-phase LCD (Liquid Crystal Display) watt-hour meter, which comprises a watt-hour meter body, wherein the watt-hour meter body adopts a circular structure, and a control board is arranged in the watt-hour meter body. The control board comprises a sampling circuit, a metering circuit, a control circuit and a display circuit which are sequentially connected. The metering circuit adopts an ADE7755 metering chip and peripheral circuits thereof, and the ADE7755 metering chip integrates a multiplier. The control circuit adopts an HT49R30 chip and peripheral circuits thereof, and the HT49R30 chip integrates a V/F convertor and a frequency divider used for outputting pulse signals, and the V/F convertor and the frequency divider are sequentially connected. The sampling circuit comprises a voltage division circuit and a current division circuit, and the control board is provided with an anti-creeping logic circuit. As the anti-creeping logic circuit is arranged, when the watt-hour meter compares with a reference voltage and reaches 115 percent of the reference voltage, and the sampling circuit collects no current, the watt-hour meter carries out output test, no more than one pulse can be generated, and therefore the electric energy metering error caused by creeping is avoided.
Description
Technical field
The utility model is specifically related to the single-phase LCD electric energy meter of a kind of circle.
Background technology
Single-phase LCD electric energy meter is the instrument that is used for family's electric energy metrical, and at present single-phase electric energy meter is most can produce the shunt running phenomenon, causes the actual power metering less than normal or bigger than normal, causes the user to pay when paying the fees more or underpays.
The utility model content
In order to solve the deficiency of above-mentioned technology, the purpose of this utility model provides the single-phase LCD electric energy meter of a kind of circle, and it has solved the deficiency that single-phase electric energy meter in the past is easy to generate the shunt running phenomenon.
The technical scheme that its technical matters that solves the utility model adopts is:
The single-phase LCD electric energy meter of a kind of circle, it comprises the electric energy meter body, described electric energy meter body adopts circular configuration, described electric energy meter body interior is provided with control panel, described control panel comprises the sample circuit that connects successively, metering circuit, control circuit and display circuit, described metering circuit adopt the ADE7755 computation chip with and peripheral circuit, described ADE7755 computation chip integrated multiplier, described control circuit adopt the HT49R30 chip with and peripheral circuit, integrated V/F transducer that connects successively of described HT49R30 chip and the frequency divider that is used for output pulse signal, described sample circuit comprises the divided circuit that is used to gather the bleeder circuit of voltage data and is used for current data, described control panel is provided with anti-shunt running logical circuit, and described anti-shunt running logical circuit is connected with control circuit with bleeder circuit respectively.
Described display circuit adopts LCD or adopts the mode of step motor control register counting.
Be provided with the eeprom memory that is used for data on file in the described electric energy meter body.
Described electric energy meter is provided with the anti-electricity-theft device that is used to prevent to adopt a fiery ground stealing mode stealing.
Described anti-electricity-theft device is provided with the pilot lamp that is used to indicate the stealing state.
Described control panel is provided with the pulse indicating circuit that is used for the work indication, and described pulse indicating circuit adopts light emitting diode.
The beneficial effects of the utility model are, by anti-shunt running logical circuit is set, when electric energy meter contrast reference voltage reaches 115%, and sample circuit is when gathering the electric current no current, electric energy meter test output can not produce the pulse more than, thereby avoid because shunt running causes electric energy metering error.
Description of drawings
Fig. 1 is a logical schematic of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified:
Referring to Fig. 1, the utility model comprises the electric energy meter body, described electric energy meter body adopts circular configuration, described electric energy meter body interior is provided with control panel, described control panel comprises the sample circuit 2 that connects successively, metering circuit 1, control circuit 4 and display circuit 8, described metering circuit 1 adopt the ADE7755 computation chip with and peripheral circuit, described ADE7755 computation chip integrated multiplier, described control circuit 4 adopt the HT49R30 chips with and peripheral circuit, integrated V/F transducer that connects successively of described HT49R30 chip and the frequency divider that is used for output pulse signal, described sample circuit 2 comprises the divided circuit 21 that is used to gather the bleeder circuit 22 of voltage data and is used for current data, described control panel is provided with anti-shunt running logical circuit 3, and described anti-shunt running logical circuit 3 is connected with control circuit 4 with bleeder circuit 22 respectively.
Described control circuit 4 adopt the HT49R30 chips with and peripheral circuit.Described HT49RC30 chip is 8 high-performance reduced instruction set computer single-chip microcomputers, have that low-power consumption, I/O are used flexibly, programmable frequency divider, counter, type of oscillation select, suspend and wake, have in addition hummer output flexibly and LCD Presentation Function up, makes more diversity of this single-chip microcomputer function.Adopt the control circuit of this single-chip microcomputer design integrated V/F transducer and frequency divider, its peripheral circuit is simple, can satisfy the design requirement of electric energy meter.
Described metering circuit 1 adopt the ADE7755 computation chip with and peripheral circuit, described ADE7755 chip integrated multiplier, the data that can be directly bleeder circuit 22 and divided circuit 21 be detected be exported energy data to control circuit by multiplier.And the formation peripheral circuit of ADE7755 chip is comparatively simple, can adapt to the miniaturization growth requirement of electric energy meter.
Sample circuit 2 is respectively applied for gathers the voltage and current data, and will detect data and be input to metering circuit 1, by the multiplier in the metering circuit 1 detected data are converted to energy data, and the energy data that obtains is input to control circuit 4, by the V/F transducer in the control circuit 4, input voltage is converted to frequency, by the frequency divider output pulse signal, control circuit 4 is showing image data and energy data respectively by display circuit 8, the utility model is provided with anti-shunt running logical circuit 3 simultaneously, the described anti-logical circuit 3 of diving adopts comparer, voltage data and the reference voltage gathered by sample circuit 2 compare, when the voltage data that collects reach reference voltage 115% the time, and sample circuit 2 does not collect current data, then comparator output signal is to control circuit 4, the frequency divider of guaranteeing control circuit 4 can output more than one pulse signal, thereby avoid because shunt running causes electric energy metering error.
Described display circuit 8 adopts LCD to show or adopt the mode of step motor control register counting.The utility model can directly directly show on LCD display by control circuit 4, also can pass through the frequency divider output pulse signal, and by pulse signal control step machine operation, the step motor control register carries out the electric energy counting and adds one.
Be provided with the eeprom memory 7 that is used for data on file in the described electric energy meter body,, be used for the energy data of store electrical energy table, conveniently check by eeprom memory 7 is set.
Described electric energy meter is provided with the anti-electricity-theft device 5 that is used to prevent to adopt a fiery ground stealing mode stealing.
Described anti-electricity-theft device 5 is provided with the pilot lamp 6 that is used to indicate the stealing state.By anti-electricity-theft device 5 is set, can be when detecting the utility model and be in the stealing state, when the voltage no current state was promptly arranged, anti-electricity-theft device 5 cut off the work of electric energy meters automatically, and by the current stealing state that is in of pilot lamp 6 indications.
Described control panel is provided with the pulse indicating circuit 9 that is used for the work indication, and described pulse indicating circuit 9 comprises light emitting diode.According to the pulse signal of frequency divider output, the control light emitting diode carries out the light on and off indication, the metering of expression electric energy according to the crest and the trough of the pulse signal of output.
The circuit that the utility model adopted is electronic applications circuit commonly used, so be not described in detail, the peripheral circuit of chip can obtain with reference to the databook of described chip simultaneously.
Embodiment should not be considered as restriction of the present utility model, but any improvement of doing based on spirit of the present utility model, all should be within protection domain of the present utility model.
Claims (6)
1. single-phase LCD electric energy meter of circle, it comprises the electric energy meter body, it is characterized in that: described electric energy meter body adopts circular configuration, described electric energy meter body interior is provided with control panel, described control panel comprises the sample circuit (2) that connects successively, metering circuit (1), control circuit (4) and display circuit (8), described metering circuit (1) adopt the ADE7755 computation chip with and peripheral circuit, described ADE7755 computation chip integrated multiplier, described control circuit (4) adopt the HT49R30 chip with and peripheral circuit, integrated V/F transducer that connects successively of described HT49R30 chip and the frequency divider that is used for output pulse signal, described sample circuit (2) comprises bleeder circuit (22) that is used to gather voltage data and the divided circuit (21) that is used for current data, described control panel is provided with anti-shunt running logical circuit (3), and described anti-shunt running logical circuit (3) is connected with control circuit (4) with bleeder circuit (22) respectively.
2. the single-phase LCD electric energy meter of circle according to claim 1 is characterized in that, described display circuit (8) adopts LCD or adopts the mode of step motor control register counting.
3. the single-phase LCD electric energy meter of circle according to claim 1 is characterized in that, is provided with the eeprom memory (7) that is used for data on file in the described electric energy meter body.
4. the single-phase LCD electric energy meter of circle according to claim 1 is characterized in that, described electric energy meter is provided with the anti-electricity-theft device (5) that is used to prevent to adopt a fiery ground stealing mode stealing.
5. the single-phase LCD electric energy meter of circle according to claim 5 is characterized in that, described anti-electricity-theft device (5) is provided with the pilot lamp (6) that is used to indicate the stealing state.
6. the single-phase LCD electric energy meter of circle according to claim 1 is characterized in that, described control panel is provided with the pulse indicating circuit (9) that is used for the work indication, and described pulse indicating circuit (9) adopts light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320079540 CN203084038U (en) | 2013-02-21 | 2013-02-21 | Circular single-phase LCD (Liquid Crystal Display) watt-hour meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320079540 CN203084038U (en) | 2013-02-21 | 2013-02-21 | Circular single-phase LCD (Liquid Crystal Display) watt-hour meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203084038U true CN203084038U (en) | 2013-07-24 |
Family
ID=48829863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320079540 Expired - Lifetime CN203084038U (en) | 2013-02-21 | 2013-02-21 | Circular single-phase LCD (Liquid Crystal Display) watt-hour meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203084038U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529287A (en) * | 2013-10-14 | 2014-01-22 | 国家电网公司 | Electric consumption information collecting system based on Hall sensor |
-
2013
- 2013-02-21 CN CN 201320079540 patent/CN203084038U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529287A (en) * | 2013-10-14 | 2014-01-22 | 国家电网公司 | Electric consumption information collecting system based on Hall sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130724 |
|
| CX01 | Expiry of patent term |