CN103364632A - Intelligent digital display instrument - Google Patents
Intelligent digital display instrument Download PDFInfo
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- CN103364632A CN103364632A CN2013102539426A CN201310253942A CN103364632A CN 103364632 A CN103364632 A CN 103364632A CN 2013102539426 A CN2013102539426 A CN 2013102539426A CN 201310253942 A CN201310253942 A CN 201310253942A CN 103364632 A CN103364632 A CN 103364632A
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Abstract
The invention relates to an intelligent digital display instrument, which comprises a power supply unit, a metering unit, a keyboard input unit, a storage, an LED (Light-Emitting Diode) driving control unit, a CPU (Central Processing Unit) main control unit, a switching value input circuit and a relay output circuit, wherein the CPU main control unit is used for receiving a power metering parameter output by the metering unit, and scanning and displaying the value, magnitude order and unit of the power metering parameter on an LED digital tube in a correlative way through the LED driving control unit; the SPI (Serial Peripheral Interface) communication interface of the metering unit is connected to the first universal I/O (Input/Output) interface of the CPU main control unit; the serial port of the storage is connected to the I2C (Inter-integrated Circuit) serial interface of the CPU main control unit; the serial port of the LED driving control unit is connected to the second universal I/O interface of the CPU main control unit; and the output end of the keyboard input unit is connected to the third universal I/O interface of the CPU main control unit. The CPU main control unit is only used for controlling and scanning a quantity value to be displayed and closing output of other irrelevant quantity values, so that a user can read the power parameter value rapidly and visually.
Description
Technical field
The present invention relates to a kind of intelligent digital displaying meter.
Background technology
Usually, multifunctional electric meter can be measured and show multiple common parameters of electric power, such as voltage, electric current, active power, reactive power, applied power, frequency, power factor, active energy, reactive energy etc.Existing multifunctional electric meter adopts charactron and pilot lamp mostly, cooperates with the mark on the product casing in addition, distinguishes the numerical value, the order of magnitude, the unit that show multiple electric-power metering parameter.The defective of this multifunctional electric meter is: because the restriction of panel size, the arrangement of mark seems crowded, reads parameters of electric power also not directly perceived, very inconvenient.
The development of multifunctional electric meter, have higher requirement also for the power supply unit of electric instrument: voltage ripple is little, and load capacity is large, volume is little.Yet traditional linear power supply can't satisfy further developing of intelligent digital displaying meter.
Summary of the invention
The object of the invention is to overcome the defective of prior art, provide a kind of panel clear, be convenient to read the electric-power metering parameter, have the intelligent digital displaying meter of the built-in power unit that meets the multifunctional electric meter development trend.
For achieving the above object, the present invention adopts a kind of like this intelligent digital displaying meter, comprises
Power supply unit is with thinking that each element circuit provides power supply;
Metering units in order to the signal of reception from three-phase voltage sampling unit and three-phase current sampling unit, and transforms the electric-power metering parameter in real time;
The keyboard input block is in order to switching menu and input program parameters;
Storer, in order to the preservation of described program parameters, described program parameters comprises the alarm threshold value of described electric-power metering parameter;
The LED driving control unit, in order to drive the LED charactron of rear class, described LED charactron is in order to the state of real-time demonstration input switch amount, output switch amount, electric-power metering parameter and numerical value thereof, the order of magnitude, unit;
The CPU main control unit, be used for receiving the electric-power metering parameter of described metering units output, and by described LED driving control unit, numerical value, the order of magnitude and the unit of described electric-power metering parameter scanned explicitly be shown in described LED charactron, described CPU main control unit is also monitored described electric-power metering parameter, when described electric-power metering parameter arrives alarm threshold value, output control signals to outputting circuit for relay;
And switching value input circuit and described outputting circuit for relay, the SPI communication interface of described metering units is connected to the first universaling I/O port of described CPU main control unit, and the serial port of described storer is connected to the I of described CPU main control unit
2C serial line interface, the serial port of described LED driving control unit are connected to the second universaling I/O port of described CPU main control unit, and the output terminal of described keyboard input block is connected to the 3rd universaling I/O port of described CPU main control unit.Compared with the prior art, beneficial effect of the present invention is embodied in: the state that shows input switch amount, output switch amount by the LED charactron, electric-power metering parameter and numerical value thereof, the order of magnitude, unit, and the CPU main control unit only needs gated sweep value to be shown, close the output of other incoherent values, the user can fast read the parameters of electric power value, and is simple and clear.
Especially, described power supply unit comprises single end flyback converter, described single end flyback converter comprises high-frequency transformer and feedback control loop, described feedback control loop comprises three end adjustable reference power supply and optocouplers, first level output of described high-frequency transformer is through commutation diode, current-limiting resistance, described three end adjustable reference power supplys are connected to secondary ground, the reference edge of described three end adjustable reference power supplys is connected to the node of resistor voltage divider network, the entrance anode of described optocoupler and negative electrode respectively with the cathode terminal of described commutation diode, the negative pole of described three end adjustable reference power supplys connects, and the outlet emitter of described optocoupler is connected to the power input of power-supply controller of electric.Adopt the Switching Power Supply design of inverse excitation type converter, can fully satisfy light, little, thin power supply unit designing requirement, also can have a cost low, the characteristics that reliability is high.
Especially, a road of first level of described high-frequency transformer is output as described storer, described CPU main control unit, the power supply of described LED driving control unit, and another road output of first level of described high-frequency transformer is described metering units power supply through filter unit.Adopt filter unit, can the phase mutual interference between the power supply of governor circuit and metering units, can guarantee the reliability of main control unit and the accuracy of metering units.
Especially, described intelligent digital displaying meter 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 intelligent digital displaying meter.
Description of drawings
Fig. 1 is the functional-block diagram of embodiment of the invention intelligent digital displaying meter;
Fig. 2 is the application wiring diagram of LED charactron in the embodiment of the invention intelligent digital displaying meter;
Fig. 3 is the schematic diagram of power supply unit in the embodiment of the invention intelligent digital displaying meter.
Embodiment
Shown in Fig. 1～3, a kind of intelligent digital displaying meter comprises
Power supply unit is with thinking that each element circuit provides power supply;
Metering units in order to the signal of reception from three-phase voltage sampling unit and three-phase current sampling unit, and transforms the electric-power metering parameter in real time;
The keyboard input block is in order to switching menu and input program parameters;
Storer, in order to the preservation of program parameters, program parameters comprises the alarm threshold value of electric-power metering parameter;
The LED driving control unit, in order to drive the LED charactron of rear class, the LED charactron is in order to the state of real-time demonstration input switch amount, output switch amount, electric-power metering parameter and numerical value thereof, the order of magnitude, unit;
The CPU main control unit, be used for receiving the electric-power metering parameter of metering units output, and by the LED driving control unit, numerical value, the order of magnitude and the unit of electric-power metering parameter scanned explicitly be shown in the LED charactron, the CPU main control unit is the monitoring power electric measuring parameter also, when the electric-power metering parameter arrives alarm threshold value, output control signals to outputting circuit for relay;
And switching value input circuit and outputting circuit for relay, the SPI communication interface of metering units is connected to the first universaling I/O port of CPU main control unit, and the serial port of storer is connected to the I of CPU main control unit
2C serial line interface, the serial port of LED driving control unit are connected to the second universaling I/O port of CPU main control unit, and the output terminal of keyboard input block is connected to the 3rd universaling I/O port of CPU main control unit.Wherein the LED charactron comprises three in order to characterize four 8 piece of digital pipes of electric-power metering parameter values, eight luminescent characters VA in order to the unit of sign, Wh, Hz, Varh, Pf, mA, two luminescent characters k, M in order to characterize the order of magnitude, seven in order to characterize the luminescent characters a of phase mark, b, c, n.
Power supply unit comprises single end flyback converter, single end flyback converter comprises high-frequency transformer TR1 and feedback control loop, feedback control loop comprises three end adjustable reference power supply U3 and optocoupler U2, first the level output of high-frequency transformer TR1 is through commutation diode DD10, current-limiting resistance RR10, three end adjustable reference power supply U3 are connected to secondary ground, the reference edge of three end adjustable reference power supply U3 is connected to the node A of resistor voltage divider network, the entrance anode of optocoupler U2 and negative electrode respectively with the cathode terminal of commutation diode DD10, the negative pole of three end adjustable reference power supply U3 connects, and the outlet emitter of optocoupler U2 is connected to the power input of power-supply controller of electric UR1.
A road of first level of high-frequency transformer TR1 is output as storer, CPU main control unit, the power supply of LED driving control unit, and another road output of first level of high-frequency transformer TR1 is the metering units power supply through filter unit.
Intelligent digital displaying meter 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 (4)
1. an intelligent digital displaying meter is characterized in that: comprise
Power supply unit is with thinking that each element circuit provides power supply;
Metering units in order to the signal of reception from three-phase voltage sampling unit and three-phase current sampling unit, and transforms the electric-power metering parameter in real time;
The keyboard input block is in order to switching menu and input program parameters;
Storer, in order to the preservation of described program parameters, described program parameters comprises the alarm threshold value of described electric-power metering parameter;
The LED driving control unit, in order to drive the LED charactron of rear class, described LED charactron is in order to the state of real-time demonstration input switch amount, output switch amount, electric-power metering parameter and numerical value thereof, the order of magnitude, unit;
The CPU main control unit, be used for receiving the electric-power metering parameter of described metering units output, and by described LED driving control unit, numerical value, the order of magnitude and the unit of described electric-power metering parameter scanned explicitly be shown in described LED charactron, described CPU main control unit is also monitored described electric-power metering parameter, when described electric-power metering parameter arrives alarm threshold value, output control signals to outputting circuit for relay;
And switching value input circuit and described outputting circuit for relay, the SPI communication interface of described metering units is connected to the first universaling I/O port of described CPU main control unit, and the serial port of described storer is connected to the I of described CPU main control unit
2C serial line interface, the serial port of described LED driving control unit are connected to the second universaling I/O port of described CPU main control unit, and the output terminal of described keyboard input block is connected to the 3rd universaling I/O port of described CPU main control unit.
2. intelligent digital displaying meter according to claim 1, it is characterized in that: described power supply unit comprises single end flyback converter, described single end flyback converter comprises high-frequency transformer and feedback control loop, described feedback control loop comprises three end adjustable reference power supply and optocouplers, first level output of described high-frequency transformer is through commutation diode, current-limiting resistance, described three end adjustable reference power supplys are connected to secondary ground, the reference edge of described three end adjustable reference power supplys is connected to the node of resistor voltage divider network, the entrance anode of described optocoupler and negative electrode respectively with the cathode terminal of described commutation diode, the negative pole of described three end adjustable reference power supplys connects, and the outlet emitter of described optocoupler is connected to the power input of power-supply controller of electric.
3. intelligent digital displaying meter according to claim 2, it is characterized in that: a road of first level of described high-frequency transformer is output as described storer, described CPU main control unit, the power supply of described LED driving control unit, and another road output of first level of described high-frequency transformer is described metering units power supply through filter unit.
4. according to claim 1,2 or 3 described intelligent digital displaying meters, it is characterized in that: described intelligent digital displaying meter 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.
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| CN2013102539426A CN103364632A (en) | 2013-06-25 | 2013-06-25 | Intelligent digital display instrument |
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| CN2013102539426A CN103364632A (en) | 2013-06-25 | 2013-06-25 | Intelligent digital display instrument |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105939119A (en) * | 2016-07-01 | 2016-09-14 | 温州市逸达科技有限公司 | Power supply circuit of electric sewing machine |
| CN106557452A (en) * | 2015-09-25 | 2017-04-05 | 阿里巴巴集团控股有限公司 | For the display packing of numeric character or character string, device, equipment and system |
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2013
- 2013-06-25 CN CN2013102539426A patent/CN103364632A/en active Pending
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106557452A (en) * | 2015-09-25 | 2017-04-05 | 阿里巴巴集团控股有限公司 | For the display packing of numeric character or character string, device, equipment and system |
| CN106557452B (en) * | 2015-09-25 | 2020-08-11 | 阿里巴巴集团控股有限公司 | Display method, device, equipment and system for numerical characters or character strings |
| CN105939119A (en) * | 2016-07-01 | 2016-09-14 | 温州市逸达科技有限公司 | Power supply circuit of electric sewing machine |
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Application publication date: 20131023 |