CN205809161U

CN205809161U - Electric measurement transducer

Info

Publication number: CN205809161U
Application number: CN201620483461.3U
Authority: CN
Inventors: 孙运建; 范贤军; 张明; 苏蛟; 许文专; 张凤雏
Original assignee: JIANGYIN SFERE ELECTRIC CO Ltd
Current assignee: JIANGYIN SFERE ELECTRIC CO Ltd
Priority date: 2016-05-25
Filing date: 2016-05-25
Publication date: 2016-12-14
Anticipated expiration: 2026-05-25

Abstract

The utility model discloses a kind of electric measurement transducer, it includes MCU module, for the voltage/current signals of electrical network being converted to the voltage/current measurement module of low analog voltage/current signal, communication module, analog quantity transformation output module and being used for the instruction according to MCU module and send the relay output module of warning, voltage/current measurement module, communication module, analog quantity transformation output module and relay output module electrically connect with MCU module respectively；MCU module receives low analog voltage/current signal, by communication module, digital signal being reached Monitor Computer Control System and digital signal reaches analog quantity transformation output module and relay output module, analog quantity transformation output module converts digital signals into analog level signal and reaches backstage reception equipment.Communication function, analog quantity transformation output and alarm relay output function can be realized, have that response time is short, intelligent, safe and reliable to operation, facilitate client to use advantage.

Description

Electric measurement transducer

Technical field

This utility model relates to a kind of electric measurement transducer.

Background technology

At present, a lot of electric measurement transducer use pure analog circuit or digital PWM (pulse width modulation) Mode, the transmitter scene capacity of resisting disturbance of employing analog form is poor and harmonic effects is bigger, it is impossible to real Existing communication function；The transmitter onsite application response time using digital PWM mode is longer, exports mould Analog quantity signal ripple is bigger, it is impossible to enough meet onsite application demand.

Utility model content

The technical problems to be solved in the utility model is to overcome electric measurement transducer of the prior art On-the-spot capacity of resisting disturbance is poor and harmonic effects is relatively big or onsite application response time is longer and output mould The defect that analog quantity signal ripple is bigger, it is provided that a kind of novel electric measurement transducer.

This utility model solves above-mentioned technical problem by following technical proposals:

This utility model provides a kind of electric measurement transducer, and its feature is, it includes that a MCU is (micro- Control unit) module, one for the voltage/current signals of electrical network being converted to low analog voltage/current letter Number voltage/current measurement module, a communication module, an analog quantity transformation output module and one for basis The instruction of this MCU module sends the relay output module of alarm signal, and this voltage/current measures mould Block, this communication module, this analog quantity transformation output module and this relay output module respectively with this MCU Module electrically connects；

This MCU module receives this voltage/current measurement module and sends the low analog voltage/current signal of coming, And the digital signal after processing is sent to a Monitor Computer Control System and should by this communication module Digital data transmission is to this analog quantity transformation output module and this relay output module, this analog quantity transformation This digital signal is converted to analog level signal and transmits to a backstage reception equipment by output module.

It is preferred that the first Digital I/O of this voltage/current measurement module and this MCU module (inputs defeated Go out) interface electrical connection, (universal asynchronous receiving-transmitting transmits the UART of this communication module and this MCU module Device) interface electrical connection, this analog quantity transformation output module connects with the second Digital I/O of this MCU module Mouth electrical connection, this relay output module electrically connects with the 3rd Digital I/O interface of this MCU module.

It is preferred that this MCU module is a single-chip microcomputer.

It is preferred that this single-chip microcomputer uses the single-chip microcomputer of RN7211 model.

It is preferred that this electric measurement transducer also includes a power module, this power module respectively with this MCU Module, this voltage/current measurement module, this communication module, this analog quantity transformation output module and this relay Device output module electrically connects.

It is preferred that this power module is an inverse-excitation type switch power-supply.

It is preferred that this digital signal is passed by this communication module by RS485 interface (serial transmission interface) Deliver to this Monitor Computer Control System.

It is preferred that this analog quantity transformation output module uses light-coupled isolation SPI (Serial Peripheral Interface (SPI)) electricity Road.

On the basis of meeting common sense in the field, above-mentioned each optimum condition, can combination in any, obtain this reality By novel each preferred embodiments.

Positive progressive effect of the present utility model is:

This utility model can solve the problem that old analog scheme transmitter poor anti jamming capability, harmonic effects big, Do not support on-scene communication, and the shortcoming such as digital PWM mode transmitter response time length, ripple be big, and And, this utility model can realize communication function, analog quantity transformation output and alarm relay output function. This utility model has that response time is short, intelligent, safe and reliable to operation, facilitate the advantages such as client's use.

Accompanying drawing explanation

Fig. 1 is the structured flowchart of the electric measurement transducer of this utility model preferred embodiment.

Fig. 2 is the circuit theory diagrams of the MCU module of this utility model preferred embodiment.

Fig. 3 is the circuit theory diagrams of the voltage/current measurement module of this utility model preferred embodiment.

Fig. 4 is the circuit theory diagrams of the communication module of this utility model preferred embodiment.

Fig. 5 is the circuit theory diagrams of the analog quantity transformation output module of this utility model preferred embodiment.

Fig. 6 is the circuit theory diagrams of the relay output module of this utility model preferred embodiment.

Fig. 7 is the circuit theory diagrams of the power module of this utility model preferred embodiment.

Detailed description of the invention

For making the purpose of this utility model embodiment, technical scheme and advantage clearer, below in conjunction with Accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out clear, It is fully described by, it is clear that described embodiment is a part of embodiment of this utility model rather than complete The embodiment in portion.Based on the embodiment in this utility model, those of ordinary skill in the art are not making The every other embodiment obtained on the premise of creative work, broadly falls into the model of this utility model protection Enclose.

As it is shown in figure 1, the present embodiment provides a kind of electric measurement transducer, it include a MCU module 1, One surveys for the voltage/current signals of electrical network is converted to the voltage/current of low analog voltage/current signal Amount module 2, communication module 3, analog quantity transformation output module 4, one is for according to this MCU mould The instruction of block sends relay output module 5 and a power module 6 of alarm signal.

Wherein, this MCU module 1 is a single-chip microcomputer, and this single-chip microcomputer uses the monolithic of RN7211 model Machine.

This voltage/current measurement module 2 electrically connects with the first Digital I/O interface of this MCU module 1, This communication module 3 electrically connects with the UART interface of this MCU module 1, this analog quantity transformation output mould Block 4 electrically connects with the second Digital I/O interface of this MCU module 1, this relay output module 5 with 3rd Digital I/O interface electrical connection of this MCU module 1.This power module 6 respectively with this MCU mould Block 1, this voltage/current measurement module 2, this communication module 3, this analog quantity transformation output module 4 and This relay output module 5 electrically connects.

As it is shown on figure 3, this voltage/current measurement module 2 is for data acquisition, use transformer isolation The receivable low simulation electricity of this MCU module 1 that the voltage/current Parameters Transformation of electrical network is relatively low by mode Pressure/current signal.

As shown in figures 2-6, this MCU module 1 by this voltage/current measurement module 2 realize voltage/ The acquisition function of current signal, and will process after digital signal be sent to upper by this communication module 3 Machine monitoring system, it is sent to backstage by analog quantity transformation output module 4 and receives equipment, and pass through relay Device output module 5 realizes off-limit alarm function.

Wherein, this communication module 3 passes through RS485 interface by this digital data transmission to this ipc monitor System, RS485 interface chip uses MAX13085.

This analog quantity transformation output module 4 uses light-coupled isolation SPI circuit, optocoupler U6, U8, U10 Model be EL357, by receiving the digital signal that this MCU module 1 sends over, be converted into mould Intend voltage signal, it is achieved the pick-up output of analog quantity.

The digital signal that this relay output module 5 sends over according to this MCU module 1, it is achieved more The control of limit alarm signal, relay uses ALDP105W.

As it is shown in fig. 7, this power module 6 is respectively this MCU module 1, this voltage/current measures mould Block 2, this communication module 3, this analog quantity transformation output module 4 and this relay output module 5 provide Working power, this power module 6 uses inverse-excitation type switch power-supply, power supply master chip U2 to be TNY286.

Although the foregoing describing detailed description of the invention of the present utility model, but those skilled in the art should Working as understanding, these are merely illustrative of, and protection domain of the present utility model is to be limited by appended claims Fixed.Those skilled in the art is on the premise of without departing substantially from principle of the present utility model and essence, permissible These embodiments are made various changes or modifications, but these changes and amendment each fall within this utility model Protection domain.

Claims

1. an electric measurement transducer, it is characterised in that it includes a MCU module, for by electricity Net voltage/current signals be converted to the voltage/current measurement module of low analog voltage/current signal, one lead to Letter module, an analog quantity transformation output module and one are for sending warning according to the instruction of this MCU module The relay output module of signal, this voltage/current measurement module, this communication module, this analog quantity transformation Output module and this relay output module electrically connect with this MCU module respectively；

2. electric measurement transducer as claimed in claim 1, it is characterised in that this voltage/current is measured Module electrically connects with the first Digital I/O interface of this MCU module, this communication module and this MCU module UART interface electrical connection, the second Digital I/O of this analog quantity transformation output module and this MCU module Interface electrically connects, and this relay output module electrically connects with the 3rd Digital I/O interface of this MCU module.

3. electric measurement transducer as claimed in claim 1, it is characterised in that this MCU module is Single-chip microcomputer.

4. electric measurement transducer as claimed in claim 3, it is characterised in that this single-chip microcomputer uses The single-chip microcomputer of RN7211 model.

5. electric measurement transducer as claimed in claim 1, it is characterised in that this electric measurement transducer Also include a power module, this power module respectively with this MCU module, this voltage/current measurement module, This communication module, this analog quantity transformation output module and the electrical connection of this relay output module.

6. electric measurement transducer as claimed in claim 5, it is characterised in that this power module is Inverse-excitation type switch power-supply.

7. electric measurement transducer as claimed in claim 1, it is characterised in that this communication module is passed through This digital signal is sent to this Monitor Computer Control System by RS485 interface.

8. electric measurement transducer as claimed in claim 1, it is characterised in that this analog quantity transformation is defeated Go out module and use light-coupled isolation SPI circuit.