CN203350320U - Single-phase combination meter - Google Patents
Single-phase combination meter Download PDFInfo
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- CN203350320U CN203350320U CN 201320471172 CN201320471172U CN203350320U CN 203350320 U CN203350320 U CN 203350320U CN 201320471172 CN201320471172 CN 201320471172 CN 201320471172 U CN201320471172 U CN 201320471172U CN 203350320 U CN203350320 U CN 203350320U
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- control unit
- main control
- cpu main
- pilot lamp
- led driving
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- Circuit Arrangement For Electric Light Sources In General (AREA)
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Abstract
The utility model relates to a single-phase combination meter. The single-phase combination meter comprises an LED driving control unit and a CPU main control unit. The CPU main control unit is used for receiving measured values of electric power metering parameters output by a metering unit, and the measured values, orders of magnitude, units of the electric power metering parameters are relatively scanned by the CPU main control unit and are displayed on a digital display unit. An SPI communication interface of the metering unit is connected with a first group general I/O interface of the CPU main control unit. A serial interface of a memory is connected to an I2C serial interface of the CPU main control unit. A serial interface of the LED driving control unit is connected with a second group general I/O interface of the CPU main control unit. A switching value output circuit is connected with a third group general I/O interface of the CPU main control unit. The voltage and current of a circuit, the measured values, orders of magnitude of frequency, and scan display codes of the units are converted into serial data via the CPU main control unit, and a serial format of the serial data is converted into a parallel format by the LED driving control unit, so that the loss of pin resources is greatly reduced.
Description
Technical field
The utility model relates to a kind of single-phase combination table.
Background technology
Along with the development of power automation, be arranged on the measured value that electric instrument on subscriber's line need to be monitored a plurality of parameters of electric power simultaneously.Existing economical single-phase combination table often adopts the timesharing of single LED charactron to show a plurality of electric-power metering parameters, when can't accomplish a plurality of electric-power metering parameter, read, the single-phase combination table of existing another kind adopts many row LED charactrons to show one by one a plurality of electric-power metering parameters, but the pin inadequate resource of the preciousness of CPU main control unit enough distributes.
Summary of the invention
The purpose of this utility model is to overcome the defect of prior art, a kind of many row LED charactrons voltage, electric current and frequency values of real-time circuit respectively of adopting is provided, and adopt the LED driving control unit to export the scanning show code of digital display unit, can greatly save the single-phase combination table of the pin resource of CPU main control unit.
For achieving the above object, the utility model adopts a kind of so single-phase combination table, comprise metering units, storer and for the keyboard input block of switching value action threshold value is set, described single-phase combination table also comprises LED driving control unit and CPU main control unit, described LED driving control unit is controlled for the latching with the driving of digital display unit of scan code of described keyboard input block, described digital display unit comprises in order to three groups of four LED charactrons of real-time demonstration electric-power metering measured value of parameters and the order of magnitude in order to described electric-power metering measured value of parameters, to be associated in real time and to show, the pilot lamp combination of unit, described CPU main control unit is for the measured value of the electric-power metering parameter that receives the output of described metering units, measured value by described electric-power metering parameter, the order of magnitude and unit scan explicitly and are shown in described digital display unit, the SPI communication interface of described metering units is connected to first group of universaling I/O port of described CPU main control unit, the serial port of described storer is connected to the I of described CPU main control unit
2the C serial line interface, the serial port of described LED driving control unit is connected to second group of universaling I/O port of described CPU main control unit, and switching value output circuit is connected to the 3rd group of universaling I/O port of described CPU main control unit.Compared with the prior art, the beneficial effects of the utility model are embodied in: by the CPU main control unit, the scanning show code of the measured value of line voltage distribution, electric current and frequency, the order of magnitude and unit is converted to serial data, and employing LED driving control unit, this serial data is converted to parallel form by serial form, can greatly reduces the loss of pin resource.
Especially, described pilot lamp combination comprises the first pilot lamp group and the second pilot lamp group, the bit code pin of the common port of the common port of described the first pilot lamp group and described the second pilot lamp group and described three groups of four LED charactrons is connected to respectively on the deferent segment pin of described LED driving control unit, after the control end of the segment encode pin of described three groups of four LED charactrons and the control end of described the first pilot lamp group and described the second pilot lamp group is in parallel one by one respectively, be connected on the carry-out bit pin of described LED driving control unit.By being divided into groups for the pilot lamp combination that shows the order of magnitude and unit, include the output of scanning show code in controls together with the measured value of line voltage distribution, electric current and frequency, the user is when reading electric parameter measurement numerical value, reading is carried out in the demonstration of composite measurement value, unit and the order of magnitude, product not only measurement range is wide, also very simple and clear.
Especially, described single-phase combination table also comprises 485 communication units, and the data line of described 485 communication units is connected to the UART serial ports of described CPU main control unit.Adopt 485 communication units, can realize remote monitoring and the control of single-phase combination table.
The accompanying drawing explanation
Fig. 1 is the functional-block diagram of the single-phase combination table of the utility model embodiment;
Fig. 2 is that in the single-phase combination table of the utility model embodiment, the LED driving control unit drives the schematic diagram of controlling digital display unit.
Embodiment
As shown in Fig. 1～2, a kind of single-phase combination table, comprise metering units, storer and for the keyboard input block of switching value action threshold value is set, single-phase combination table also comprises LED driving control unit and CPU main control unit, the LED driving control unit is controlled for the latching with the driving of digital display unit of scan code of keyboard input block, digital display unit comprises in order to three groups of four LED charactrons of real-time demonstration electric-power metering measured value of parameters and the order of magnitude in order to the electric-power metering measured value of parameters, to be associated in real time and to show, the pilot lamp combination of unit, the CPU main control unit is for the measured value of the electric-power metering parameter that receives metering units output, measured value by the electric-power metering parameter, the order of magnitude and unit scan explicitly and are shown in digital display unit, the SPI communication interface of metering units is connected to first group of universaling I/O port of CPU main control unit, the serial port of storer is connected to the I of CPU main control unit
2the C serial line interface, the serial port of LED driving control unit is connected to second group of universaling I/O port of CPU main control unit, and switching value output circuit is connected to the 3rd group of universaling I/O port of CPU main control unit.
The pilot lamp combination comprises the first pilot lamp group and the second pilot lamp group, the bit code pin LW1～LW4 of the common port LW13 of the common port LW14 of the first pilot lamp group and the second pilot lamp group and three groups of four LED charactrons, LW5～LW8, LW9-LW11 is connected to respectively on deferent segment pin SEG3～SEG16 of LED driving control unit U201, after the control end of the segment encode pin LA～LH of three groups of four LED charactrons and the control end of the first pilot lamp group and the second pilot lamp group is in parallel one by one respectively, be connected on carry-out bit pin GRID1～GRID8 of LED driving control unit U201.Wherein, the first pilot lamp group comprises one group of light emitting diode 14LED1～14LED5, and the second pilot lamp group comprises another group light emitting diode 13LED1～13LED6, and three groups of four LED charactrons comprise LED charactron module LED201～LED203.
Single-phase combination table also comprises 485 communication units, and the data line of 485 communication units is connected to the UART serial ports of CPU main control unit.
Claims (3)
1. a single-phase combination table, comprise metering units, storer and for the keyboard input block of switching value action threshold value is set, it is characterized in that: described single-phase combination table also comprises LED driving control unit and CPU main control unit, described LED driving control unit is controlled for the latching with the driving of digital display unit of scan code of described keyboard input block, described digital display unit comprises in order to three groups of four LED charactrons of real-time demonstration electric-power metering measured value of parameters and the order of magnitude in order to described electric-power metering measured value of parameters, to be associated in real time and to show, the pilot lamp combination of unit, described CPU main control unit is for the measured value of the electric-power metering parameter that receives the output of described metering units, measured value by described electric-power metering parameter, the order of magnitude and unit scan explicitly and are shown in described digital display unit, the SPI communication interface of described metering units is connected to first group of universaling I/O port of described CPU main control unit, the serial port of described storer is connected to the I of described CPU main control unit
2the C serial line interface, the serial port of described LED driving control unit is connected to second group of universaling I/O port of described CPU main control unit, and switching value output circuit is connected to the 3rd group of universaling I/O port of described CPU main control unit.
2. single-phase combination table according to claim 1, it is characterized in that: described pilot lamp combination comprises the first pilot lamp group and the second pilot lamp group, the bit code pin of the common port of the common port of described the first pilot lamp group and described the second pilot lamp group and described three groups of four LED charactrons is connected to respectively on the deferent segment pin of described LED driving control unit, after the control end of the segment encode pin of described three groups of four LED charactrons and the control end of described the first pilot lamp group and described the second pilot lamp group is in parallel one by one respectively, be connected on the carry-out bit pin of described LED driving control unit.
3. single-phase combination table according to claim 1 and 2, it is characterized in that: described single-phase combination table also comprises 485 communication units, the data line of described 485 communication units is connected to the UART serial ports of described CPU main control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320471172 CN203350320U (en) | 2013-07-28 | 2013-07-28 | Single-phase combination meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320471172 CN203350320U (en) | 2013-07-28 | 2013-07-28 | Single-phase combination meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203350320U true CN203350320U (en) | 2013-12-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320471172 Expired - Fee Related CN203350320U (en) | 2013-07-28 | 2013-07-28 | Single-phase combination meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203350320U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793042A (en) * | 2015-04-10 | 2015-07-22 | 中煤科工集团上海研究院 | Serial signal detection system and method |
-
2013
- 2013-07-28 CN CN 201320471172 patent/CN203350320U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793042A (en) * | 2015-04-10 | 2015-07-22 | 中煤科工集团上海研究院 | Serial signal detection system and method |
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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: 20131218 Termination date: 20170728 |
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| CF01 | Termination of patent right due to non-payment of annual fee |