CN202794377U - Multifunctional electric power meter - Google Patents

Multifunctional electric power meter Download PDF

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Publication number
CN202794377U
CN202794377U CN 201220388770 CN201220388770U CN202794377U CN 202794377 U CN202794377 U CN 202794377U CN 201220388770 CN201220388770 CN 201220388770 CN 201220388770 U CN201220388770 U CN 201220388770U CN 202794377 U CN202794377 U CN 202794377U
Authority
CN
China
Prior art keywords
processing unit
connects
central processing
transistor
amplifier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201220388770
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Chinese (zh)
Inventor
邵玉峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Chuoan Automation Control Equipment Co Ltd
Original Assignee
Zhejiang Chuoan Automation Control Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Chuoan Automation Control Equipment Co Ltd filed Critical Zhejiang Chuoan Automation Control Equipment Co Ltd
Priority to CN 201220388770 priority Critical patent/CN202794377U/en
Application granted granted Critical
Publication of CN202794377U publication Critical patent/CN202794377U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a multifunctional electric power meter, comprising a central processing unit and an electronic quantity detecting module, wherein the electronic quantity detecting module is used for inputting a detected electronic quantity signal which is processed by a measuring and processing unit to the central processing unit; the central processing unit is used for outputting electronic quantity data which is received from the measuring and processing unit to a digital display circuit and a storing module to display and store the electronic quantity data; and the central processing unit is additionally connected with a keying circuit and an RS485 communication interface which is used for communicating with an upper computer. According to the multifunctional electric power meter, the electronic quantity data is transmitted to the upper computer by the central processing unit through the RS485 communication interface, to realize a remote monitoring and a management on the power quality; and the working staff needs not to view detection data on scene.

Description

Multifunctional electric meter
Technical field
The utility model relates to a kind of electric instrument, specifically, relates in particular to a kind of multifunctional electric meter.
Background technology
In occasions such as electric system, industrial and mining enterprises, communal facility, intelligent buildings, need the power application instrument that the quality of power supply is measured and managed, and traditional electric instrument can only carry out the scene demonstration usually, need the staff to check one by one to the scene, both wasted time and energy, and can not effectively measure and manage the quality of power supply again.
The utility model content
The purpose of this utility model is for the problems referred to above, and a kind of multifunctional electric meter is provided, and has realized the telemanagement of the quality of power supply.
For achieving the above object, the utility model has adopted following technical proposal: comprise central processing unit and electric weight detection module, described electric weight detection module is input to central processing unit with the electric quantity signal that detects behind the metering processing unit, the electric quantity data that described central processing unit will receive from measuring processing unit, the memory module that outputs to for the digital display circuit that shows and be used for storing, the RS485 communication interface that described central processing unit also connects key circuit and is used for communicating with the outside.
Above-mentioned multifunctional electric meter, wherein, the output terminal of described central processing unit also connects change and send output circuit.
Above-mentioned multifunctional electric meter, wherein, described change send output circuit to comprise D/A conversion chip U1 and amplifier A1, U2 and transistor Q1, Q2, the input end of described D/A conversion chip U1 connects central processing unit, the output terminal of this D/A conversion chip U1 is connected to the input end of amplifier A1 through resistance R 1, the negative input of described amplifier A1 connects public terminal GND through resistance R 4, the output terminal of described amplifier A1 connects the grid of transistor Q1, the source electrode of described transistor Q1 connects the negative input of amplifier A1, and the drain electrode of described transistor Q1 is through resistance R 2, diode D2 is connected power supply+Vcc with D1; The positive input of described amplifier A2 connects the drain electrode of transistor Q1, the negative input of described amplifier A2 connects the drain electrode of transistor Q1 and connects the negative electrode of diode D2 through resistance R 3, the output terminal of described amplifier A2 connects the grid of transistor Q2, the source electrode of described transistor Q2, the drain electrode of transistor Q2 are output terminal Iout.
Above-mentioned multifunctional electric meter, wherein, described central processing unit also connects the I/O imput output circuit.
Compared with prior art, the utlity model has following beneficial effect: the multifunction electric meter that the utility model provides, central processing unit sends to host computer by the RS485 communication interface with electric quantity data, realized remote monitoring and management to the quality of power supply, the staff does not need the scene to check the detection data.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structured flowchart of a kind of multifunctional electric meter of the utility model;
Fig. 2 becomes the electrical block diagram that send output circuit among Fig. 1.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, the multifunctional electric meter that the utility model provides comprises central processing unit 1 and electric weight detection module 3, phase voltage in described electric weight detection module 3 detection of grid, the line voltage and current, and every phase active power and total active power that the electric quantity signal that detects is obtained after the 2 interior processing of metering processing unit, every phase reactive power and total reactive power, total power factor, total applied power and meritorious electrical parameters such as (reactive energies), the electric quantity data that described central processing unit 1 will receive from measuring processing unit 2, outputing to digital display circuit 4 and memory module 5 shows and stores, the RS485 communication interface 7 that described central processing unit 3 also connects key circuit 6 and is used for communicating with host computer, central processing unit 3 is carried out corresponding function according to the input of key circuit 6, for example definition push key is Menu key respectively, acknowledgement key and a left side, key moves right, when pressing Menu key, alternately carry out and enter or withdraw from menu, pass through a left side after entering menu, the key that moves right selects to want the function carried out, after pressing acknowledgement key, corresponding function is carried out in central processing unit 3 controls.The output terminal of described central processing unit 3 also connects change and send output circuit 6 and I/O imput output circuit 8.
As shown in Figure 2, described change send output circuit 6 to comprise D/A conversion chip U1 and amplifier A1, U2 and transistor Q1, Q2, the input end of described D/A conversion chip U1 connects central processing unit, the output terminal of this D/A conversion chip U1 is connected to the input end of amplifier A1 through resistance R 1, the negative input of described amplifier A1 connects public terminal GND through resistance R 4, the output terminal of described amplifier A1 connects the grid of transistor Q1, the source electrode of described transistor Q1 connects the negative input of amplifier A1, and the drain electrode of described transistor Q1 is connected power supply+Vcc through resistance R 2, diode D2 with D1; The positive input of described amplifier A2 connects the drain electrode of transistor Q1, the negative input of described amplifier A2 connects the drain electrode of transistor Q1 and connects the negative electrode of diode D2 through resistance R 3, the output terminal of described amplifier A2 connects the grid of transistor Q2, the source electrode of described transistor Q2, the drain electrode of transistor Q2 is output terminal Iout, obtains 4-20mA direct current standard signal at output terminal Iout.
The multifunction electric meter that the utility model provides, central processing unit sends to host computer by the RS485 communication interface with electric quantity data, has realized remote monitoring and management to the quality of power supply, and the staff does not need the scene to check the detection data.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims (4)

1. multifunctional electric meter, it is characterized in that: comprise central processing unit and electric weight detection module, described electric weight detection module is input to central processing unit with the electric quantity signal that detects behind the metering processing unit, the electric quantity data that described central processing unit will receive from measuring processing unit, the memory module that outputs to for the digital display circuit that shows and be used for storing, the RS485 communication interface that described central processing unit also connects key circuit and is used for communicating with the outside.
2. multifunctional electric meter according to claim 1 is characterized in that: the output terminal of described central processing unit also connects to become and send output circuit.
3. multifunctional electric meter according to claim 2, it is characterized in that: described change send output circuit to comprise D/A conversion chip U1 and amplifier A1, U2 and transistor Q1, Q2, the input end of described D/A conversion chip U1 connects central processing unit, the output terminal of this D/A conversion chip U1 is connected to the input end of amplifier A1 through resistance R 1, the negative input of described amplifier A1 connects public terminal GND through resistance R 4, the output terminal of described amplifier A1 connects the grid of transistor Q1, the source electrode of described transistor Q1 connects the negative input of amplifier A1, and the drain electrode of described transistor Q1 is through resistance R 2, diode D2 is connected power supply+Vcc with D1; The positive input of described amplifier A2 connects the drain electrode of transistor Q1, the negative input of described amplifier A2 connects the drain electrode of transistor Q1 and connects the negative electrode of diode D2 through resistance R 3, the output terminal of described amplifier A2 connects the grid of transistor Q2, the source electrode of described transistor Q2, the drain electrode of transistor Q2 are output terminal Iout.
4. multifunctional electric meter according to claim 1, it is characterized in that: described central processing unit also connects the I/O imput output circuit.
CN 201220388770 2012-08-07 2012-08-07 Multifunctional electric power meter Expired - Fee Related CN202794377U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220388770 CN202794377U (en) 2012-08-07 2012-08-07 Multifunctional electric power meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220388770 CN202794377U (en) 2012-08-07 2012-08-07 Multifunctional electric power meter

Publications (1)

Publication Number Publication Date
CN202794377U true CN202794377U (en) 2013-03-13

Family

ID=47821619

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220388770 Expired - Fee Related CN202794377U (en) 2012-08-07 2012-08-07 Multifunctional electric power meter

Country Status (1)

Country Link
CN (1) CN202794377U (en)

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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: 20130313

Termination date: 20170807

CF01 Termination of patent right due to non-payment of annual fee