CN201788203U - Liquid crystal three-phase voltameter - Google Patents
Liquid crystal three-phase voltameter Download PDFInfo
- Publication number
- CN201788203U CN201788203U CN2010202849405U CN201020284940U CN201788203U CN 201788203 U CN201788203 U CN 201788203U CN 2010202849405 U CN2010202849405 U CN 2010202849405U CN 201020284940 U CN201020284940 U CN 201020284940U CN 201788203 U CN201788203 U CN 201788203U
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- liquid crystal
- crystal display
- display panel
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- phase
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Abstract
The utility model discloses a liquid crystal three-phase voltameter, which comprises a shell and a measuring circuit arranged in the shell, the back of the shell is provided with an RS 232 communication interface, an RS 485 communication interface, and a three-phase input terminal block, and the front of the shell is provided with a high-precision LCD (liquid crystal display) device. The LCD device comprises an LCD driver circuit board, an LCD panel and an LCD panel protection bracket which are connected sequentially. The measuring circuit comprises an isolating and transforming unit, a measuring unit adopting a special meter chip ATT7026A, a data processing and memory chip unit, a control unit connected with the LCD device, and a communication unit which are connected sequentially. By using the special meter chip ATT7026A to measure and compute three-phase voltage, current, active power, reactive power, power factor, active energy, and reactive energy, the liquid crystal three-phase voltameter has more measurement parameters and stable and accurate measurement; and the high-precision LCD device visually and conveniently displays measured and input data, has high display precision, and can meet the need of an electrical power system.
Description
Technical field
The utility model relates to the electric quantity metering device field, relates in particular to a kind of liquid crystal three-phase electricity scale.
Background technology
Voltameter is a device of measuring the metering electric energy, and in each process of power system power supply, electric energy measurement is a very important ring.Voltameter is the foundation of carrying out economic balance, examination between electric power enterprise, electrical network and the user as the measurement mechanism of electric power commodity exchange, and whether the accurate measurement of voltameter, is directly connected to the vital interests of electricity consumption each side.
Compare with traditional stem-winder, adopt the three-phase electricity scale of electronics measuring principle, have that measuring accuracy is higher, the measurement parameter more superiority.But existing three-phase electricity scale one not energy measurement active energy and reactive energy, and its display device one be that charactron shows that its display precision is lower.Along with the development of power technology, existing three-phase electricity scale can not satisfy the demand of electric system fully, needs that measurement parameter is more, measurement and the higher three-phase electricity scale of display precision just can satisfy the demands.
Summary of the invention
The utility model purpose provides a kind ofly can measure that active energy and reactive energy, measurement parameter are many, measurement and the high liquid crystal three-phase electricity scale of display precision.
The utility model adopts following scheme to realize: liquid crystal three-phase electricity scale comprises housing and is located at the interior metering circuit of housing, back side of shell is provided with RS232, RS485 communication interface and three-phase input wires terminal, wherein said housing front is provided with liquid crystal indicator, and described metering circuit comprises isolated variable unit, measuring unit, data processing and the storage chip unit that connects successively, control module, the communication unit that connects liquid crystal indicator.
Described liquid crystal indicator comprises liquid crystal display drive circuit plate, liquid crystal display panel, liquid crystal display panel protective cradle; the liquid crystal display drive circuit plate is fixed in the housing; liquid crystal display panel is fixed on the liquid crystal display drive circuit plate its front and exposes from middle part, housing front; the liquid crystal display panel protective cradle is fixed on and covers the liquid crystal display panel surrounding on the liquid crystal display drive circuit plate, and liquid crystal display panel inside comprises four high precision LCD MODULE circuit.
Described measuring unit adopts special-purpose computation chip ATT7026A, and ATT7026A can measure active power, reactive power, power factor, active energy, reactive energy.
Described isolated variable unit comprises the current transformer of measuring electric current.
The beneficial effects of the utility model are: adopt said structure, utilize special-purpose computation chip ATT7026A to measure and calculate three-phase voltage, electric current, active power, reactive power, power factor, active energy, reactive energy, its measurement parameter is many, measurement is accurately stable; The liquid crystal indicator that employing has the high precision LCD MODULE shows measurement and imports data intuitive and convenient, display precision height, can satisfy the electric system demand.
Description of drawings
Now in conjunction with the accompanying drawings the utility model is further elaborated: Fig. 1 is the main TV structure synoptic diagram of the utility model liquid crystal three-phase electricity scale; Fig. 2 is the backsight structural representation of the utility model liquid crystal three-phase electricity scale; Fig. 3 is the syndeton synoptic diagram of the utility model metering circuit; Fig. 4 is the structural representation of the utility model liquid crystal indicator.
Embodiment
As Fig. 1 or shown in Figure 2, the utility model comprises housing 1 and the metering circuit 2 of being located at housing interior 1, and housing 1 back side is provided with RS232, RS485 communication interface 11 and three-phase input wires terminal 12, and wherein said housing 1 front is provided with liquid crystal indicator 3; As shown in Figure 3, described metering circuit 2 comprises isolated variable unit 21, measuring unit 22, data processing and the storage chip unit 23 that connects successively, control module 24, the communication unit 25 that connects liquid crystal indicator 3.
As shown in Figure 4; described liquid crystal indicator 3 comprises liquid crystal display drive circuit plate 31, liquid crystal display panel 32, liquid crystal display panel protective cradle 33; liquid crystal display drive circuit plate 31 is fixed in the housing 1; liquid crystal display panel 32 is fixed on the liquid crystal display drive circuit plate 31 its front and exposes from housing 1 positive middle part; liquid crystal display panel protective cradle 33 is fixed on and covers liquid crystal display panel 32 surroundings on the liquid crystal display drive circuit plate 31, and liquid crystal display panel 32 inside comprise four high precision LCD MODULE circuit.
Described measuring unit 22 adopts special-purpose computation chip ATT7026A, and ATT7026A can measure active power, reactive power, power factor, active energy, reactive energy.
Described isolated variable unit 21 comprises the current transformer 211 of measuring electric current.
Claims (4)
1. liquid crystal three-phase electricity scale, housing and the metering circuit of being located in the housing, back side of shell is provided with RS232, RS485 communication interface and three-phase input wires terminal, it is characterized in that: described housing front is provided with liquid crystal indicator, and described metering circuit comprises isolated variable unit, measuring unit, data processing and the storage chip unit that connects successively, control module, the communication unit that connects liquid crystal indicator.
2. a kind of liquid crystal three-phase electricity scale according to claim 1; it is characterized in that: described liquid crystal indicator comprises the liquid crystal display drive circuit plate; liquid crystal display panel; the liquid crystal display panel protective cradle; the liquid crystal display drive circuit plate is fixed in the housing; liquid crystal display panel is fixed on the liquid crystal display drive circuit plate its front and exposes from middle part, housing front; the liquid crystal display panel protective cradle is fixed on and covers the liquid crystal display panel surrounding on the liquid crystal display drive circuit plate, and liquid crystal display panel inside comprises four high precision LCD MODULE circuit.
3. a kind of liquid crystal three-phase electricity scale according to claim 1, it is characterized in that: described measuring unit adopts special-purpose computation chip ATT7026A.
4. a kind of liquid crystal three-phase electricity scale according to claim 1, it is characterized in that: described isolated variable unit comprises the current transformer of measuring electric current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202849405U CN201788203U (en) | 2010-08-09 | 2010-08-09 | Liquid crystal three-phase voltameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202849405U CN201788203U (en) | 2010-08-09 | 2010-08-09 | Liquid crystal three-phase voltameter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201788203U true CN201788203U (en) | 2011-04-06 |
Family
ID=43820162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202849405U Expired - Lifetime CN201788203U (en) | 2010-08-09 | 2010-08-09 | Liquid crystal three-phase voltameter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201788203U (en) |
-
2010
- 2010-08-09 CN CN2010202849405U patent/CN201788203U/en not_active Expired - Lifetime
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110406 |