CN202093088U - Electrical parameter measuring device - Google Patents
Electrical parameter measuring device Download PDFInfo
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- CN202093088U CN202093088U CN2011201964398U CN201120196439U CN202093088U CN 202093088 U CN202093088 U CN 202093088U CN 2011201964398 U CN2011201964398 U CN 2011201964398U CN 201120196439 U CN201120196439 U CN 201120196439U CN 202093088 U CN202093088 U CN 202093088U
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- 238000012544 monitoring process Methods 0.000 claims abstract description 13
- 238000004891 communication Methods 0.000 claims abstract description 8
- 238000005259 measurement Methods 0.000 claims description 15
- 238000002955 isolation Methods 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000005070 sampling Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
An electrical parameter measuring device is composed of a master control portion, a power supply system, a power supply monitoring and reset circuit, a signal pretreatment portion, an AD sampling circuit, a communication circuit, an LED display circuit and a keyboard input circuit, wherein the power supply system, the power supply monitoring and reset circuit, the AD sampling circuit, the communication circuit, the LED display circuit and the keyboard input circuit are respectively connected with the master control portion, and a voltage signal and a current signal of a power system after being pretreated by the signal pretreatment portion are conveyed to the AD sampling circuit.
Description
Technical field
The utility model relates to a kind of Power Parameters Measurement Device, is specifically related to a kind of Power Parameters Measurement Device based on the MSP430F149 single-chip microcomputer.
Background technology
In original electric system, various instrument (for example watt-hour meter, reometer, voltage table etc.) often will be installed in the high-low voltage electric power distribution cabinet, be used for realizing supervision to electric system.And the management of the safe operation of electric system is more and more higher to the requirement of electrical equipment control robotization and intelligent degree; utilize modern electronic technology, sensor technology, mechanics of communication, computing machine and network technology; monitoring, protection, control, the electric-power metering of power equipment under normal and accident conditions merged with Distributed Control System (DCS) DCS, PLC; reach good management high-level, the high grade of transparency, become a kind of inexorable trend and developing direction.
Intelligent switch cubicle substitutes simulated pointer formula instrument, relay, watt-hour meter with the intelligent electric power instrument, computer system by network communication interface and central control room is networked, thereby realizes electrical quantitys such as each voltage for distribution loop, electric current, active power, reactive power, power factor (PF), frequency, electricity are monitored.Electric system improves day by day to exchanging the requirement of gathering measuring accuracy, and traditional ac sampling device has been difficult to practical requirement.Although the designer can use at a high speed, high-precision hardware guarantees that this will certainly increase the cost of hardware.
The utility model content
The utility model is at above deficiency, provides a kind of improve measuring accuracy on common hardware platform basis, guarantees on arithmetic speed the Power Parameters Measurement Device of real-time.
The utility model is that the technical scheme that its technical matters of solution is adopted is:
A kind of Power Parameters Measurement Device, it is made of main control part, power-supply system, power supply monitoring and reset circuit, Signal Pretreatment part, AD sample circuit, communicating circuit, LED display circuit and keyboard input circuit.Wherein power-supply system, power supply monitoring and reset circuit, AD sample circuit, communicating circuit, LED display circuit and keyboard input circuit are connected with main control part respectively.Voltage and current signal conveys through the pretreated electric system of Signal Pretreatment part is given the AD sample circuit.
Main control part adopts the MSP430F149 single-chip microcomputer, and itself and AD sample circuit carry out exchanges data by the parallel port.
Power-supply system adopts 24V low-voltage DC supply mode to provide power supply to main control part.
Signal Pretreatment part will be carried out signal boost from the AC signal of the voltage transformer (VT) summation current transformer of electric system, make the fixing DC level of AC signal stack one of input, thereby level magnitude is remained between the 0-5V, and the signal after the lifting partly offers the AD sample circuit by Signal Pretreatment.
Communicating circuit adopts the RS485 bus interface modes to carry out data communication, is made up of isolation buffer module, 65LBC184 interface chip and interface protective circuit.
Description of drawings
Fig. 1 is the schematic diagram of Power Parameters Measurement Device.
Fig. 2 is the communicating circuit schematic diagram.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments, but not as to qualification of the present utility model.
As shown in Figure 1, Power Parameters Measurement Device is made of main control part, power-supply system, power supply monitoring and reset circuit, Signal Pretreatment part, AD sample circuit, communicating circuit, LED display circuit and keyboard input circuit.Wherein power-supply system, power supply monitoring and reset circuit, AD sample circuit, communicating circuit, LED display circuit and keyboard input circuit are connected with main control part respectively.Voltage and current signal conveys through the pretreated electric system of Signal Pretreatment part is given the AD sample circuit.
Wherein, main control part adopts the MSP430F149 single-chip microcomputer, and itself and AD sample circuit carry out exchanges data by the parallel port.
Power-supply system is used for providing power supply to main control part, employing be 24V low-voltage DC supply mode.
Main control part is when initially powering on, voltage is through just reaching normal nominal level after a while from 0 volt from microcosmic, be lower than or during near the working voltage of main control part minimum, may cause the fluctuation of service of main control part or unusual, power supply monitoring and reset circuit can in time carry out reset operation to main control part, can normally move to guarantee main control part.Power supply monitoring and reset circuit link to each other with main control part, its threshold voltage is made as 2.63 volts, after power-supply system voltage surpasses this threshold voltage, and power supply monitoring and reset circuit output low level reset signal, main control part is resetted reliably, thereby make it recover normal duty.
The AD sample circuit adopts the ADS7862 chip of TI company to measure the electric current and the voltage signal of electric system simultaneously.The signal incoming level of AD sample circuit is 0-5V, the Signal Pretreatment part is carried out signal boost with AC signal (DC level is zero), make the fixing DC level of AC signal stack one of input, thereby level magnitude is remained between the 0-5V, and the signal after the lifting partly offers the AD sample circuit by Signal Pretreatment.AD sample circuit and main control part carry out exchanges data by the parallel port, thereby accelerated the speed of data transmission, in the AD transfer process, only need main control part that the AD sample circuit is carried out enabled instruction, work such as sampling afterwards, maintenance, conversion need not the main control part intervention, after AD converted, the AD sample circuit sent the EOC signal, and the notice main control part carries out reading of data.
This Power Parameters Measurement Device adopts charactron as human-computer interaction interface.Adopt 58 section charactrons altogether, wherein four demonstrations that are used for data, a demonstration that is used to indicate.The serial data information of expression electric system parameter is driven by main control part, and content displayed shows on the LED of LED display circuit charactron as required.
Main control part is by the exchanges data of communicating circuit realization with background monitoring system; communicating circuit adopts the RS485 bus interface modes to carry out data communication; as shown in Figure 2; communicating circuit is made up of isolation buffer module, 65LBC184 interface chip and interface protective circuit; wherein the isolation buffer module adopts photoelectricity to isolate; make main control part and communication part circuit carry out the isolation of electric signal, further improve the antijamming capability of device.
The keyboard input circuit is operated the parameter interface display of Power Parameters Measurement Device.
Above-described embodiment, the utility model embodiment a kind of more preferably just, the common variation that those skilled in the art carries out in the technical solutions of the utility model scope and replacing all should be included in the protection domain of the present utility model.
Claims (6)
1. Power Parameters Measurement Device, it is made of main control part, power-supply system, power supply monitoring and reset circuit, Signal Pretreatment part, AD sample circuit, communicating circuit, LED display circuit and keyboard input circuit, wherein power-supply system, power supply monitoring and reset circuit, AD sample circuit, communicating circuit, LED display circuit and keyboard input circuit are connected with main control part respectively, flow to the AD sample circuit through the voltage signal and the current signal of the pretreated electric system of Signal Pretreatment part.
2. Power Parameters Measurement Device according to claim 1, wherein, described main control part adopts the MSP430F149 single-chip microcomputer, and itself and described AD sample circuit carry out exchanges data by the parallel port.
3. Power Parameters Measurement Device according to claim 1, wherein, described power-supply system adopts 24V low-voltage DC supply mode to provide power supply to described main control part.
4. Power Parameters Measurement Device according to claim 1, wherein, described Signal Pretreatment part will be respectively carried out signal boost from the described voltage signal and the current signal of the voltage transformer (VT) summation current transformer of electric system, make the fixing DC level of signal stack one of input, thereby level magnitude is remained between the 0-5V, and the signal after the lifting partly offers the AD sample circuit by described Signal Pretreatment.
5. Power Parameters Measurement Device according to claim 1, wherein, described communicating circuit adopts the RS485 bus interface modes to carry out data communication.
6. Power Parameters Measurement Device according to claim 1, wherein, described communicating circuit is made up of isolation buffer module, 65LBC184 interface chip and interface protective circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201964398U CN202093088U (en) | 2011-06-13 | 2011-06-13 | Electrical parameter measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201964398U CN202093088U (en) | 2011-06-13 | 2011-06-13 | Electrical parameter measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202093088U true CN202093088U (en) | 2011-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201964398U Expired - Fee Related CN202093088U (en) | 2011-06-13 | 2011-06-13 | Electrical parameter measuring device |
Country Status (1)
| Country | Link |
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| CN (1) | CN202093088U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675555A (en) * | 2013-12-25 | 2014-03-26 | 国家电网公司 | Power parameter measuring device based on visible light communication |
| CN104833833A (en) * | 2014-02-11 | 2015-08-12 | 华北电力大学 | Portable power grid voltage monitoring device based on MSP430 |
| CN106093557A (en) * | 2016-05-30 | 2016-11-09 | 国家电网公司 | Power Data Acquisition and Remote Transmission System Based on GPRS Communication Module |
| CN107728080A (en) * | 2017-09-30 | 2018-02-23 | 海鹰企业集团有限责任公司 | The detection circuit detected to the voltage of multiple power supplies module output |
-
2011
- 2011-06-13 CN CN2011201964398U patent/CN202093088U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675555A (en) * | 2013-12-25 | 2014-03-26 | 国家电网公司 | Power parameter measuring device based on visible light communication |
| CN104833833A (en) * | 2014-02-11 | 2015-08-12 | 华北电力大学 | Portable power grid voltage monitoring device based on MSP430 |
| CN106093557A (en) * | 2016-05-30 | 2016-11-09 | 国家电网公司 | Power Data Acquisition and Remote Transmission System Based on GPRS Communication Module |
| CN107728080A (en) * | 2017-09-30 | 2018-02-23 | 海鹰企业集团有限责任公司 | The detection circuit detected to the voltage of multiple power supplies module output |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING ESD POWER COMMUNICATIONS CO., LTD. Free format text: FORMER OWNER: BEIJING YITOU JIADE INVESTEMENT CONSULTING CO., LTD. Effective date: 20140208 |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140208 Address after: 100190, Beijing, Zhichun Road, Haidian District 51, Shen Chang building, 6 floor Patentee after: Beijing ESD Power Communications Co., Ltd. Address before: 100190, Beijing, Zhichun Road, Haidian District 51, Shen Chang building, 5 floor Patentee before: Beijing Yitou Jiade Investment Consulting Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111228 Termination date: 20170613 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |