CN201955377U

CN201955377U - Multifunctional network electric power instrument

Info

Publication number: CN201955377U
Application number: CN2011200075832U
Authority: CN
Inventors: 曲延鹏
Original assignee: YANTAI YIKE ELECTRIC TECHNOLOGY Co Ltd
Current assignee: YANTAI YIKE ELECTRIC TECHNOLOGY Co Ltd
Priority date: 2011-01-12
Filing date: 2011-01-12
Publication date: 2011-08-31
Anticipated expiration: 2021-01-12

Abstract

The utility model provides a multifunctional network electric power instrument, which comprises a power supply module, a signal sampling and metering module, a signal processing module, an LED (light-emitting diode) display module and a communication and switching value input/output module, wherein the signal sampling and metering module, the signal processing module and the LED display module are sequentially connected; the signal processing module is further connected with the communication and switching value input/output module; the signal processing module is formed by an SCM (single-chip microcomputer) chip with a model number of ARMEGA 32; and the signal processing module is used for receiving output signals of the signal sampling and metering module as well as switch input signals of the communication and switching value input/output module, and transmitting the processed information to the LED display module and the communication and switching value input/output module respectively. The multifunctional network electric power instrument has the advantages and the benefits that the chips used in the whole machine are few, the product price is lower, and the multifunctional network electric power instrument can be used in a measurement system with lower function requirement, and meanwhile, the multifunctional network electric power instrument guarantees high measuring accuracy, small volume, simple structure, low power consumption, low cost and stronger market adaptability.

Description

The multifunctional network electric instrument

Technical field

The utility model relates to measuring instrument, particularly a kind of multifunctional network electric instrument.

Background technology

Along with development of electric power industry, instrument that the monitoring of electric system is used such as various pointer and electronic simulation formula table meter more and more can not satisfy power automation, informationalized needs, shortcoming is that volume is big, power consumption is high, measuring accuracy is low, be subject to environmental interference, many be applicable to that field management, signal can not teletransmissions etc.Electric instrument is to miniaturization, intellectuality, multifunction development now, progressively realize high precision, high-performance, high stable, highly reliable, high-adaptability, multi-functional, low consumed supervisory system, particularly observing and controlling of multiparameter online in real time and automatic measuring and controlling are finished the output, amplification of collection, processing, the control signal of signal, are formed function such as networked system with miscellaneous equipment.Its advantage is multi-functional, high precision, high integration, high intelligence, high reliability, high performance-price ratio, but following shortcoming is also arranged simultaneously: complex structure, device reliability want high, and development difficulty is big, and supvr's technical merit requires height, cost height.

At present, research and development use number of chips few, and product price is low, can be used in the lower measuring system of functional requirement, and the measuring accuracy height, volume is little, simple in structure, low in energy consumption, cost is low, multifunctional network electric instrument with strong market adaptability, is a new topic of developing.

The utility model content

The purpose of this utility model is to overcome above-mentioned defective, the multifunctional network electric instrument that provide a kind of measuring accuracy height, volume is little, simple in structure, low in energy consumption, cost is low, has strong market adaptability.

For achieving the above object, the multifunctional network electric instrument that the utility model provides, comprise power module, also comprise signal sampling and metering module, signal processing module, LED display module and communication and switching value input/output module, wherein, described signal sampling and metering module, signal processing module links to each other successively with the LED display module, described signal processing module also links to each other with described communication and switching value input/output module, described signal sampling and metering module are gathered ac voltage signal and current signal, and are transported to described signal processing module with the form of coding; It is the singlechip chip formation of ATMEGA32 that described signal processing module adopts model, described signal processing module receives the output signal of described signal sampling and metering module and the switch input signal of communication and switching value input/output module, and the information that will handle is sent to described LED display module and communication and switching value input/output module respectively.

The utility model multifunctional network electric instrument, wherein said signal sampling and metering module are that the process chip of ATT7022B constitutes by model.

The utility model multifunctional network electric instrument, wherein said communication and switching value input/output module are that the process chip of MAX1487 constitutes by model.

The utility model multifunctional network electric instrument, wherein said power module comprises isolation, transformation, rectification circuit, provides stable 5V direct supply to whole instrument.

The utility model multifunctional network electric instrument, wherein said communication module and switching value input/output module have RS-485/Modbus communication interface and 2-4 way switch amount input/output terminal, and the analog quantity output of described communication and switching value input/output module comprises DC4～20mA, DC0～20mA or the DC0～5V output of three-phase voltage, three-phase current, active power/reactive power, frequency, active power electric degree/reactive power electric degree, power factor.

The advantage and the good effect of the utility model multifunctional network electric instrument are: owing to be provided with the singlechip chip formation signal processing module that the employing model is ATMEGA32, what the AC sampling of signal sampling and metering module was used is the ATT7022B chip, the number of chips that whole instrument is used is few, product price is lower, can be used in the lower measuring system of functional requirement, guaranteed the measuring accuracy height simultaneously, volume is little, simple in structure, low in energy consumption, cost is low, have strong market adaptability.

Be elaborated with reference to accompanying drawing below in conjunction with embodiment.

Description of drawings

Fig. 1 is the structural representation of the utility model multifunctional network electric instrument.

Embodiment

With reference to Fig. 1, the utility model multifunctional network electric instrument comprises power module 1, signal sampling and metering module 2, signal processing module 3, LED display module 4 and communication and switching value input/output module 5.

Wherein, signal sampling and metering module 2 are that the process chip of ATT7022B constitutes by model.Sampled signal has two kinds: voltage signal and current signal, voltage signal is the 100-400V power-frequency voltage, a plurality of divider resistance dividing potential drops in table, produce about 0.3V voltage and be input among the computation chip ATT7022 on sample resistance, current signal is the 5A electric current, and input current transformer converts the 10mA electric current to, producing about 0.1V voltage on sample resistance is input among the computation chip ATT7022, ATT7022 obtains various electrical quantitys as calculated, delivers signal processing module 3 with the form of coding at last and handles.Owing to adopt the ATT7022B chip, the performance of net list is had increased significantly,

It is the singlechip chip formation of ATMEGA32 that signal processing module 3 adopts model, the sampling of signal processing module 3 received signals and the output signal of metering module 2 and the switch input signal of communication and switching value input/output module 5, and the information that will handle is sent to LED display module 4 and communication and switching value input/output module 5 respectively.

The maximum difference of the domestic relatively like product of the utility model multifunctional network electric instrument is, what the AC sampling of signal processing module 3 was used is the ATT7022B chip, and other producers use ADE7758, CS5460 etc. as the AC sampling chip more, use the ATT7022B chip functions less, but price is low, has the strong market competitiveness in the lower measuring system of functional requirement.

Signal processing module 3 links to each other with LED display module 4, and LED display module 4 carries out code displaying with the signal that single-chip microcomputer transmits, and demonstrates corresponding data or character by LED.

Signal processing module 3 also links to each other with communication and switching value input/output module 5, and communication and switching value input/output module are that the process chip of MAX1487 constitutes by model.Communication and switching value input/output module 5 carry out level conversion or process light-coupled isolation with the signal of the band communications protocol that single-chip microcomputer transmits, and are sent in the off-balancesheet communication line and go, or the off-balancesheet communication signal is delivered to single-chip microcomputer through light-coupled isolation handle.

Communication module and switching value input/output module 5 have RS-485/Modbus communication interface and 2-4 way switch amount input/output terminal, and the analog quantity output of communication and switching value input/output module 5 comprises DC4～20mA, DC0～20mA or the DC0～5V output of three-phase voltage, three-phase current, active power/reactive power, frequency, active power electric degree/reactive power electric degree, power factor.

Power module 1 provides stable 5V direct supply by isolation, transformation, rectification to network instrument, keeps the operate as normal of whole instrument.

The utility model multifunctional network electric instrument, integrate data acquisition and control function, adopt AC Data, can directly measure the various electric weight in the three phase network, both can be used for local the demonstration, and can be connected with industrial control equipment again, formed TT﹠C system, provide communication interface to be connected, support RS485 interface MODBUS communications protocol or various protocols with computer supervisory control system.Electric quantity signal can be converted to the analog quantity output of standard, or be with the output of one road alarm relay; Or be with four tunnel (two-way) switching value input/double switch amount to export.According to different requirements,, parameters such as no-load voltage ratio, warning, communication are provided with and control by the instrument face plate button.It has electric parameter measurement and electric energy metrical is an one, the mode of operation hommization, and the operator can grasp at short notice, and read data and parameter such as are provided with at operation will become simple.In being widely used in, low pressure becomes electrical power distribution automatization system, industrial automation system, intelligent switch cubicle, building automation system, negative control system, energy management system, factory's electric weight appraisal management etc.

The technical indicator of the utility model multifunctional network electric instrument is:

Accuracy of measurement: 0.5 grade of voltage, electric current, frequency, resistive component, 1.0 grades of reaction component and power factors;

Measure the loop power consumption: voltage, electric current input circuit power consumption are all less than 0.5VA;

Supply voltage scope: AC/DC85～265V;

Industrial frequency withstand voltage: 2kV/1min (RMS) between power terminal set and signal input, the lead-out terminal group.

In addition, the utility model multifunctional network electric instrument has been selected 96 type meter cases, and its size is little, is with 4 fixed pins, is convenient to install, and watch face is bigger, is fit to multi-functional demonstration, and rear panel can be arranged abundant terminal, satisfies the input and output of various signals.Secondly, design table front panel requires attractive in appearance, succinct, displaying contents easily to understand, and is easy to operate.The rear panel end subfunction is arranged rationally, and strong and weak electricity is separately imported, exported separately, guarantees weak electric signal safety; Terminal band direction stops terminal wrong plug direction.

Embodiment recited above is described preferred implementation of the present utility model; be not that design of the present utility model and scope are limited; do not breaking away under the utility model design proposal prerequisite; common engineering technical personnel make the technical solution of the utility model in this area various modification and improvement; all should fall into protection domain of the present utility model; the technology contents that the utility model is asked for protection all is documented in claims.

Claims

1. multifunctional network electric instrument, comprise power module (1), it is characterized in that: also comprise signal sampling and metering module (2), signal processing module (3), LED display module (4) and communication and switching value input/output module (5), wherein, described signal sampling and metering module (2), signal processing module (3) links to each other successively with LED display module (4), described signal processing module (3) also links to each other with described communication and switching value input/output module (5), described signal sampling and metering module (2) are gathered ac voltage signal and current signal, and are transported to described signal processing module (3) with the form of coding; It is the singlechip chip formation of ATMEGA32 that described signal processing module (3) adopts model, described signal processing module (3) receives described signal sampling and the output signal of metering module (2) and the switch input signal of communication and switching value input/output module (5), and the information that will handle is sent to described LED display module (4) and communication and switching value input/output module (5) respectively.

2. multifunctional network electric instrument according to claim 1 is characterized in that: wherein said signal sampling and metering module (2) are that the process chip of ATT7022B constitutes by model.

3. multifunctional network electric instrument according to claim 1 and 2 is characterized in that: wherein said communication and switching value input/output module (5) are that the process chip of MAX1487 constitutes by model.

4. multifunctional network electric instrument according to claim 3 is characterized in that: wherein said power module (1) comprises isolation, transformation, rectification circuit, provides stable 5V direct supply to whole instrument.

5. multifunctional network electric instrument according to claim 4, it is characterized in that: wherein said, described communication module and switching value input/output module (5) have RS-485/Modbus communication interface and 2-4 way switch amount input/output terminal, and the analog quantity output of described communication and switching value input/output module (5) comprises DC4～20mA, DC0～20mA or the DC0～5V output of three-phase voltage, three-phase current, active power/reactive power, frequency, active power electric degree/reactive power electric degree, power factor.