CN204679791U

CN204679791U - A kind of high-voltage control circuit based on 485 communications

Info

Publication number: CN204679791U
Application number: CN201520338647.5U
Authority: CN
Inventors: 黄冬来
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-05-25
Filing date: 2015-05-25
Publication date: 2015-09-30
Anticipated expiration: 2025-05-25

Abstract

The utility model relates to a kind of high-voltage control circuit based on 485 communications, include 485 communication modules, ARM single-chip microcomputer, 51 single-chip microcomputers, current/voltage acquisition module, overcurrent/overvoltage detection module, D/A modular converter and power control terminal and PC host computer, PC host computer and 485 communication module bidirectional data communications, described 485 communication modules and ARM single-chip microcomputer bidirectional data communication, the output signal of described current/voltage acquisition module is transferred to ARM single-chip microcomputer, the output signal of ARM single-chip microcomputer is sent to power control terminal through D/A modular converter, ARM single-chip microcomputer also with 51 single-chip microcomputer bidirectional data communications, the output signal of 51 single-chip microcomputers is sent to power control terminal, the output signal of power control terminal is sent to 51 single-chip microcomputers through overcurrent/overvoltage detection module, the utility model has remotely-controlled function, and can monitor in real time the abnormal conditions of power output end, ensure the normal operation of electric system.

Description

A kind of high-voltage control circuit based on 485 communications

Technical field

The utility model relates to electronic circuit field, particularly be a kind of based on 485 communication high-voltage control circuit.

Background technology

Power industry is the infrastructural industries and the public utilities that support national economy and social development, along with the fast development of Chinese national economy and improving constantly of living standards of the people, also more and more higher to the degree of dependence of electric power.Electricity needs and national economy closely related, electricity elasticity coefficients reflects the relativeness of electricity consumption growth rate and growth of the national economic speed.

Since reform and opening-up, since China's economy enters fast-developing period, particularly this century, the fast development of industrialization, urbanization, marketization and internationalization., pull heavy industry and power industry constantly to increase with the high speed exceeding front 20 annual speed of developments, trend is also in continuation; Future Ten year is critical period of constructing well-off society, from the cycle of economy and electric power development, China's economy and electric power development entered the new round lead-time from 2010, this period, process of industrialization is accelerated, by penetration depth processing stage, along with industry restructuring, scientific-technical progress and industrial structure analysis and basically achieve modernization.And in electric system, for the control of high-tension electricity, but have very large difficulty in practice, and accident rate is high.

Utility model content

The purpose of this utility model is to solve the problem, and provides a kind of high-voltage control circuit based on 485 communications.

The utility model solves the technical scheme that its technical matters adopts: a kind of high-voltage control circuit based on 485 communications, include 485 communication modules, ARM single-chip microcomputer, 51 single-chip microcomputers, current/voltage acquisition module, overcurrent/overvoltage detection module, D/A modular converter and power control terminal and PC host computer, described PC host computer and 485 communication module bidirectional data communications, described 485 communication modules and ARM single-chip microcomputer bidirectional data communication, the output signal of described current/voltage acquisition module is transferred to ARM single-chip microcomputer, the output signal of described ARM single-chip microcomputer is sent to power control terminal through D/A modular converter, described ARM single-chip microcomputer also with 51 single-chip microcomputer bidirectional data communications, the output signal of described 51 single-chip microcomputers is sent to power control terminal, the output signal of described power control terminal is sent to 51 single-chip microcomputers through overcurrent/overvoltage detection module.

Preferably, described ARM single-chip microcomputer adopts LPC2134 chip.

Preferably, described 51 single-chip microcomputers adopt STC89C51 chip.

By adopting above-mentioned technical scheme, the beneficial effects of the utility model are: the utility model

There is the function of far distance controlled and time monitoring, and can monitor in real time the abnormal conditions of power output end, ensure the normal operation of electric system.

Accompanying drawing explanation

Fig. 1 is frame assumption diagram of the present utility model;

Fig. 2 is circuit theory diagrams of the present utility model.

Embodiment

The utility model is further illustrated below in conjunction with the drawings and specific embodiments.

As Fig. 1, shown in Fig. 2, a kind of high-voltage control circuit based on 485 communications of the present utility model, include 485 communication modules, ARM single-chip microcomputer, 51 single-chip microcomputers, current/voltage acquisition module, overcurrent/overvoltage detection module, D/A modular converter and power control terminal and PC host computer, described PC host computer and 485 communication module bidirectional data communications, described 485 communication modules and ARM single-chip microcomputer bidirectional data communication, the output signal of described current/voltage acquisition module is transferred to ARM single-chip microcomputer, the output signal of described ARM single-chip microcomputer is sent to power control terminal through D/A modular converter, described ARM single-chip microcomputer also with 51 single-chip microcomputer bidirectional data communications, the output signal of described 51 single-chip microcomputers is sent to power control terminal, the output signal of described power control terminal is sent to 51 single-chip microcomputers through overcurrent/overvoltage detection module.Its principle of work is: send instruction by PC host computer, ARM single-chip microcomputer is sent to through 485 communication modules, and carry out instruction process, output voltage is arranged, power control terminal is transferred to through D/A modular converter, by overcurrent/overvoltage detection module, detection is sampled to power control terminal again, and testing result is fed back to 51 single-chip microcomputers, and feed back to PC host computer by ARM single-chip microcomputer and 485 communication modules, by PC upper computer end analysis result, make control, regulate, reach the object of Long-distance Control and time monitoring.

Described ARM single-chip microcomputer adopts LPC2134 chip, this chip is 16/32 the ARM7TDMI-S CPU supporting real-time simulation and Embedded Trace based on, operating voltage is+3.3V, and with the high speed flash storage that 32kB, 64kB, 128kB, 256kB and 512kB embed.Memory interface and unique accelerating structure of 128 bit widths enable 32 codes run under maximum clock speed.Have the strict application controlled can use 16 Thumb patterns that code size is decreased beyond 30% to code size, and property loss of energy is very little.The analog acquisition of primary responsibility current/voltage acquisition module and the setting to output voltage in the utility model, 485 communication modules in the utility model have the high speed characteristics of 485, widely use in the application, mainly as the connection hinge of 51 single-chip microcomputers and PC host computer in the utility model, 6N135 chip is adopted to carry out isolation signals, this signal is interference-free, ensures the stability of system.

Described 51 single-chip microcomputers adopt STC89C51 chips, its built-in standard 51 kernel, the machine cycle, operating frequency range: 0 ~ 40MHz, have ISP (in-system programmable components) IAP (able to programme in application), without the need to Special programming emulator; Operating voltage is 3.8-5.5V.In the present system, because ARM single-chip microcomputer operating voltage is+3.3V, and other interfaces are+5V operating voltage, in order to connect miscellaneous part, reduce Power convert, so the expansion adopting 51 single-chip microcomputers to be used as transmitting and hinge, group will be responsible for digital quantity inquiry, the output voltage switch control rule of overcurrent/overvoltage.

D/A modular converter in the utility model, mainly carries out digital-to-analog conversion by the instruction of ARM single-chip microcomputer, and passes to power control terminal, carries out output and controls.

Overcurrent in the utility model/overvoltage detection module, mainly power output end is sampled, and will obtain signal through conversion after pass to 51 single-chip microcomputers, 51 single-chip microcomputers are again through ARM single-chip microcomputer and 485 communication module interfaces, pass to PC host computer, analyze, if by exception, particularly open circuit conditions, then PC host computer staff notifies that maintenance personal scene is checked.

Above-describedly be only a preferred embodiment of the present utility model, the scope that the utility model is implemented can not be limited, every equalization change of doing according to the utility model claim and decoration, all should still belong in scope that the utility model contains.

Claims

1. the high-voltage control circuit based on 485 communications, it is characterized in that: include 485 communication modules, ARM single-chip microcomputer, 51 single-chip microcomputers, current/voltage acquisition module, overcurrent/overvoltage detection module, D/A modular converter and power control terminal and PC host computer, described PC host computer and 485 communication module bidirectional data communications, described 485 communication modules and ARM single-chip microcomputer bidirectional data communication, the output signal of described current/voltage acquisition module is transferred to ARM single-chip microcomputer, the output signal of described ARM single-chip microcomputer is sent to power control terminal through D/A modular converter, described ARM single-chip microcomputer also with 51 single-chip microcomputer bidirectional data communications, the output signal of described 51 single-chip microcomputers is sent to power control terminal, the output signal of described power control terminal is sent to 51 single-chip microcomputers through overcurrent/overvoltage detection module.

2. a kind of high-voltage control circuit based on 485 communications according to claim 1, its feature exists: described ARM single-chip microcomputer adopts LPC2134 chip.

3. a kind of high-voltage control circuit based on 485 communications according to claim 1 and 2, its feature exists: described 51 single-chip microcomputers adopt STC89C51 chip.