CN205844393U - A kind of general electric parameters composite measurement module - Google Patents

Abstract

The utility model discloses a kind of general electric parameters composite measurement module, including: power module, RS485 communication module, mailing address dial-up module, input and output modulate circuit, AC sampling loop and the direct current sampling circuit that CPU module is connected with CPU module；Described AC sampling loop includes AC sampling modulate circuit and ATT7028 peripheral circuit module, described direct current sampling circuit includes direct current sampling circuit and ATT7053B peripheral circuit module, the outfan of described AC sampling loop and direct current sampling circuit is connected with CPU module by spi bus communication isolation circuit, and described CPU module uses ARM M0 main control chip.This utility model have employed main control chip based on ARM M0, and AD sampling is completed by special energy chip ATT7028 and ATT7053B, simplifies the design of input signal conditioning circuit, improves the precision of sampling.

Description

A kind of general electric parameters composite measurement module

Technical field

It is transforming plant source monitoring system that this utility model relates to major domain, and research meets measures diverse in function, survey Weight range is big, precision is high, possess the composite measurement module of intelligent communication requirement, is specifically related to a kind of general electric parameters and comprehensively surveys Amount module.

Background technology

Transforming plant origin system is the important component part of transformer station, is the basis ensureing power network safety operation, The real-time operating conditions monitoring of power-supply system is the important leverage of its stable operation.

Transforming plant source monitoring system is the key core equipment in transformer station's power supply, and its Main Function is monitoring in real time The running status of power-supply system, finds potential safety hazard present in system operation in time, transports for transforming plant origin system Dimension personnel provide important monitoring means.Therefore the safe and reliable of transformer station's Power Supply Monitoring has very important meaning to transformer station Justice.

Utility model content

Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, discloses a kind of logical Electric parameters composite measurement module.

This utility model solves its technical problem and be the technical scheme is that

A kind of general electric parameters composite measurement module, it is characterised in that: including: CPU module is connected with CPU module Power module, RS485 communication module, mailing address dial-up module, input and output modulate circuit, AC sampling loop and direct current are adopted Sample loop；Described AC sampling loop includes AC sampling modulate circuit and ATT7028 peripheral circuit module, and described direct current is sampled Loop includes the defeated of direct current sampling circuit and ATT7053B peripheral circuit module, described AC sampling loop and direct current sampling circuit Going out end to be connected with CPU module by spi bus communication isolation circuit, described CPU module uses ARM-M0 main control chip.

Further, described AC sampling modulate circuit includes current-limiting resistance R2, current transformer TV0815 and by resistance The Anti-aliasing Filter Circuits that R8, R10, R11, R15, R17 and electric capacity C29, C32 are constituted, its outfan produces differential signal ATT0_ UA0_P and ATT0_UA0_N and ATT7028 peripheral circuit module is connected, described ATT7028 peripheral circuit module and master control core Sheet is connected by spi bus communication isolation circuit.

Further, described direct current sampling modulate circuit is by divider resistance R66, R41, R43, R44 and electric capacity C63, C65 Constituting Anti-aliasing Filter Circuits, it is peripheral that its outfan produces differential signal ATT1_UHM_P and ATT1_UHM_N and ATT7053B Circuit module connects, and described ATT7053B peripheral circuit module is connected by spi bus communication isolation circuit with main control chip.

Further, described input and output modulate circuit includes opening into modulate circuit and outputs modulate circuit, described in open into Modulate circuit include nurse one's health resistance, optically isolated chip TLP281, output single order high pass circuit, open into signal by conditioning resistance with The input of optically isolated chip TLP281 connects, and the outfan of optically isolated chip TLP281 passes through single order high pass circuit and CPU's GPIO pin connects.

Further, output modulate circuit described in and use Darlington crystal-driven pipe ULN2803.

Further, described RS485 telecommunication circuit uses ADM2582 chip.

This utility model compared with prior art has the advantage that

This utility model is capable of opening into semaphore, alternating voltage amount, ac flow, DC voltage amount, unidirectional current The measurement of the multi-signal amounts such as flow, has been provided simultaneously with outputing the control configurable function of logic, has been widely used in transformer station and uses The occasions such as the electric parameters monitoring in Power Supply Monitoring, intelligent building；Possess measurement diverse in function, measurement scope is big, precision is high, configuration Flexibly, the features such as intelligent communication requirement are met；The composite measurement module that this utility model is developed, have employed master based on ARM-M0 Control chip, AD sampling is completed by special energy chip ATT7028 and ATT7053B, simplifies input signal conditioning circuit Design, improves the precision of sampling.

Accompanying drawing explanation

A kind of general electric parameters composite measurement function structure chart that Fig. 1 provides for this utility model；

The described CPU module circuit diagram that Fig. 2 provides for this utility model；

The described AC sampling modulate circuit figure that Fig. 3 provides for this utility model；

The described ATT7028 peripheral module circuit diagram that Fig. 4 provides for this utility model；

The described direct current sampling modulate circuit figure that Fig. 5 provides for this utility model；

The described ATT7053B peripheral module circuit diagram that Fig. 6 provides for this utility model；

The described SPI communication isolation circuit diagram that Fig. 7 provides for this utility model；

Fig. 8 opens into modulate circuit figure described in this utility model offer；

Fig. 9 outputs modulate circuit figure described in this utility model offer；

The described RS485 communication module circuitry figure that Figure 10 provides for this utility model.

Detailed description of the invention

Below in conjunction with the accompanying drawings and embodiment describes this utility model detailed description of the invention:

See a kind of general electric parameters composite measurement function structure chart that Fig. 1 provides for this utility model.

As it is shown in figure 1, a kind of general electric parameters composite measurement module, including: the electricity that CPU module is connected with CPU module Source module, RS485 communication module, mailing address dial-up module, input and output modulate circuit, AC sampling loop and direct current sampling Loop；Described AC sampling loop includes AC sampling modulate circuit and ATT7028 peripheral circuit module, and described direct current is sampled back Road includes direct current sampling circuit and ATT7053B peripheral circuit module, described AC sampling loop and the output of direct current sampling circuit End is connected with CPU module by spi bus communication isolation circuit, and described CPU module uses ARM-M0 main control chip.

The described CPU module circuit diagram that Fig. 2 provides for this utility model.

ARM-M0 main control chip has an embedded microprocessor based on ARM framework, alternating voltage and current measurement Use independent sampling circuit；The sampling channel of DC voltage and DC current is completely isolated；The module side by intelligent communication Formula, it is achieved send in sample information and output the functions such as logic configuration.

See Fig. 3, Fig. 4 and Fig. 7, the described AC sampling modulate circuit figure that wherein Fig. 3 provides for this utility model；Fig. 4 The described ATT7028 peripheral module circuit diagram provided for this utility model；The described SPI communication that Fig. 7 provides for this utility model Isolation circuit diagram.

As shown in Fig. 3, Fig. 4 and Fig. 7, AC sampling modulate circuit include current-limiting resistance R2, current transformer TV0815 and The Anti-aliasing Filter Circuits being made up of resistance R8, R10, R11, R15, R17 and electric capacity C29, C32, its outfan produces difference letter Number ATT0_UA0_P and ATT0_UA0_N and ATT7028 peripheral circuit module is connected, described ATT7028 peripheral circuit module with Main control chip is connected by spi bus communication isolation circuit.Alternating voltage and current sample use independent sampling circuit, utilize Special energy acquisition processes chip ATT7028 and builds and meet alternating current power supply and sampling circuit that current acquisition requires, by ATT7028 completes the signal processing functions such as filtering, conversion, and its result of calculation is sent in the microprocessor of module by spi bus； Wherein the processing mode to alternating voltage is to use current transformer TV0815 to realize isolation and filter function, it is ensured that be input to energy The signal of amount chip ATT7028 meets sampling request.The peripheral circuit of ATT7028 is as shown in Figure 4.Select the sampling of ATT7028 Rate is 3.2kHz, and the cut-off frequency of the Anti-aliasing Filter Circuits of design is f=1/2*pi*R*C, the electricity selecting resistance to be 1.2k Ω Resistance, is calculated cut-off frequency about 13.3kHz.ATT7028 chip directly uses spi bus to communicate with main control chip.

See Fig. 5 to Fig. 7, the described direct current sampling modulate circuit figure that wherein Fig. 5 provides for this utility model；Fig. 6 is this The described ATT7053B peripheral module circuit diagram that utility model provides；The described SPI communication isolation that Fig. 7 provides for this utility model Circuit diagram.

As shown in Figures 5 to 7, direct current sampling modulate circuit be by divider resistance R66, R41, R43, R44 and electric capacity C63, C65 constitutes Anti-aliasing Filter Circuits, and its outfan produces differential signal ATT1_UHM_P and ATT1_UHM_N and ATT7053B Peripheral circuit module connects, and described ATT7053B peripheral circuit module is with main control chip by spi bus communication isolation circuit even Connect.

DC voltage and DC current path use completely isolated mode, completely isolated between each direct current channel, possess Different power supply earth potentials, can meet the sampling request of different electrical power system simultaneously, prevents short circuit between different electrical power system, Its sampling principle uses special energy sampled chip ATT7053B to realize data acquisition and signal processing, is led to by spi bus Result of calculation is sent in the microprocessor of module by letter.The peripheral crystal oscillator frequency being supplied to ATT7053B is 6MHz, ATT7053B Spi bus communication is used with main control chip.

Seeing Fig. 8 and Fig. 9, wherein Fig. 8 opens into modulate circuit figure described in this utility model offer；Fig. 9 is this practicality Modulate circuit figure is provided described in novel offer.

As shown in Figure 8 and Figure 9, input and output modulate circuit includes opening into modulate circuit and outputs modulate circuit, described in open Enter modulate circuit to include nursing one's health resistance, optically isolated chip TLP281, output single order high pass circuit, open into signal by conditioning resistance Being connected with the input of optically isolated chip TLP281, the outfan of optically isolated chip TLP281 passes through single order high pass circuit and CPU GPIO pin connect, described in output modulate circuit use Darlington crystal-driven pipe ULN2803.

In this utility model embodiment, optically isolated chip TLP281 realizes opening the isolation into signal Yu CPU, opens and leads to into signal Cross conditioning resistance (selecting 10k Ω) and be input to light every chip, during photosensitive conducting, high by the single order being made up of electric capacity and resistor coupled in parallel Circuit passband is filtered exporting the GPIO pin of CPU and realizes intake measurement function.Outputing modulate circuit is to strengthen CPU GPIO driving force, have employed Darlington crystal-driven pipe ULN2803, it is ensured that the normal adhesive of relay coil energy, it is achieved output Control function.Output logic configuration feature, the correlation function outputing control point with sampling channel can be enabled, when sampled data exists During the interval range arranged, output relay and be failure to actuate, otherwise output the actuating of relay.

See Figure 10, the described RS485 communication module circuitry figure provided for this utility model.

As shown in Figure 10, RS485 telecommunication circuit uses ADM2582 chip, owing to module application is in environment such as Industry Control In, often having electrical noise interference transmission line, this module has selected the ADM2582 device of ADI company, collection in its single package A triple channel isolator, a tri-state differential line driver, a Differential Input receiver and an isoPower are become DC/DC transducer.ADM2582 chip uses 5V single supply to power, it is achieved thereby that completely isolated RS-485, it is ensured that communication Reliable and stable.Intelligent communication management mode uses standard Modbus communication protocol based on RS485 serial communication, by regulation Toggle switch changes the mailing address of module.

Above in conjunction with accompanying drawing, this utility model preferred implementation is explained in detail, but this utility model is not limited to Above-mentioned embodiment, in the ken that those of ordinary skill in the art are possessed, it is also possible to without departing from this utility model Make a variety of changes on the premise of objective.

Many other can be made without departing from spirit and scope of the present utility model to change and remodeling.Should be appreciated that this reality Being not limited to specific embodiment with novel, scope of the present utility model is defined by the following claims.

Claims (6)

1. a general electric parameters composite measurement module, it is characterised in that: including: the electricity that CPU module is connected with CPU module Source module, RS485 communication module, mailing address dial-up module, input and output modulate circuit, AC sampling loop and direct current sampling Loop；Described AC sampling loop includes AC sampling modulate circuit and ATT7028 peripheral circuit module, and described direct current is sampled back Road includes direct current sampling circuit and ATT7053B peripheral circuit module, described AC sampling loop and the output of direct current sampling circuit End is connected with CPU module by spi bus communication isolation circuit, and described CPU module uses ARM-M0 main control chip.

A kind of general electric parameters composite measurement module the most according to claim 1, it is characterised in that described AC sampling Modulate circuit include current-limiting resistance R2, current transformer TV0815 and by resistance R8, R10, R11, R15, R17 and electric capacity C29, The Anti-aliasing Filter Circuits that C32 is constituted, its outfan produces differential signal ATT0_UA0_P and ATT0_UA0_N and ATT7028 Peripheral circuit module connects, and described ATT7028 peripheral circuit module is with main control chip by spi bus communication isolation circuit even Connect.

A kind of general electric parameters composite measurement module the most according to claim 1, it is characterised in that described direct current is sampled Modulate circuit for being made up of Anti-aliasing Filter Circuits divider resistance R66, R41, R43, R44 and electric capacity C63, C65, and its outfan produces Raw differential signal ATT1_UHM_P and ATT1_UHM_N and ATT7053B peripheral circuit module is connected, and described ATT7053B is peripheral Circuit module is connected by spi bus communication isolation circuit with main control chip.

A kind of general electric parameters composite measurement module the most according to claim 1, it is characterised in that described input and output Modulate circuit includes opening into modulate circuit and outputs modulate circuit, described in open and include nursing one's health resistance, optically isolated core into modulate circuit Sheet TLP281, output single order high pass circuit, opened and be connected with the input of optically isolated chip TLP281 by conditioning resistance into signal, The outfan of optically isolated chip TLP281 is connected with the GPIO pin of CPU by single order high pass circuit.

A kind of general electric parameters composite measurement module the most according to claim 4, it is characterised in that described in output conditioning Circuit uses Darlington crystal-driven pipe ULN2803.

A kind of general electric parameters composite measurement module the most according to claim 1, it is characterised in that described RS485 leads to Letter circuit uses ADM2582 chip.