CN212183115U

CN212183115U - Computer protection device using serial port color screen

Info

Publication number: CN212183115U
Application number: CN202020552500.7U
Authority: CN
Inventors: 魏德华; 刘东超; 熊慕文; 陈志刚; 刘鹏; 邓劲东
Original assignee: NR Electric Co Ltd; NR Engineering Co Ltd
Current assignee: NR Electric Co Ltd; NR Engineering Co Ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2020-12-18
Anticipated expiration: 2030-04-15

Abstract

The utility model discloses a microcomputer protection device using a serial port color screen, which comprises a central controller CPU, a human-computer interaction interface, a power conversion module, a FLASH module, a current-voltage transformer, a remote signaling input module and a relay, wherein the central controller CPU collects the alternating current input of the current-voltage transformer, judges the state of the remote signaling input module and controls the opening and closing of the relay; the FLASH module is used for storing device fixed value information and executing fault alarm; the human-computer interaction interface adopts a serial port color screen and controls the serial port color screen to communicate with the outside through a protocol message; one end of the serial port color screen is in communication connection with the Central Processing Unit (CPU), and the other end of the serial port color screen is connected with the power supply conversion module. The utility model discloses use the various screen to replace traditional dot matrix screen, can satisfy user's individualized demand under certain scene, realize more intelligent pleasing to the eye man-machine interaction and nimble configuration.

Description

Computer protection device using serial port color screen

Technical Field

The utility model relates to a computer protection device among the electric power system, concretely relates to use computer protection device of serial ports color screen.

Background

The microcomputer protection device debugs and maintains products through printing information at first, and then integrates a Liquid Crystal Display (LCD) as a human-computer interaction interface. At present, dot matrix screens in relay protection products are widely applied due to the fact that the dot matrix screens are economical and convenient and can meet the necessary graphic and text display functions, but the dot matrix screens cannot be applied to all application scenes. With the arrival of the era of the internet of things and the iterative development of intelligent stations, users in certain application scenes put forward more and more personalized demands on liquid crystal so as to realize more intelligent and attractive man-machine interaction, and the dot matrix screen cannot present rich colors and complex patterns and cannot realize flexible configuration.

SUMMERY OF THE UTILITY MODEL

The purpose of the invention is as follows: an object of the utility model is to provide a can guarantee that microcomputer protection device stabilizes smooth operation, simultaneously, can also satisfy user's individualized demand, present abundant color and complicated pattern and realize nimble configuration.

The technical scheme is as follows: the utility model comprises a central controller CPU, a man-machine interaction interface, a power conversion module, a FLASH module, a current-voltage transformer, a remote signaling input module and a relay which are respectively connected with the central controller CPU, wherein, the central controller CPU collects the AC input of the current-voltage transformer, judges the state of the remote signaling input module and controls the opening and closing of the relay; the power supply conversion module provides a working power supply for the Central Processing Unit (CPU), and the FLASH module is used for storing device constant value information and executing fault alarm; the human-computer interaction interface adopts a serial port color screen and controls the serial port color screen to communicate with the outside through a protocol message; one end of the serial port color screen is in communication connection with the Central Processing Unit (CPU), and the other end of the serial port color screen is connected with the power supply conversion module.

One end of the serial port color screen is in communication connection with a Central Processing Unit (CPU) through a simulation serial port, so that the influence of the message volume brought by serial port communication on other functions of the device during normal operation can be reduced, and the stable operation of the microcomputer protection device is ensured.

The Central Processing Unit (CPU) collects alternating current input of the current-voltage transformer through the built-in analog-to-digital converter (ADC), and judges the state of the remote signaling input module through the I/O interface.

And the CPU of the central controller carries out standard protocol communication through a serial port and an Ethernet port.

And the hardware interface of the serial port color screen selects a TTL level mode through a jumper.

The serial port color screen adopts a DMT64480T056 model.

The central controller CPU is of the STM32 type.

Has the advantages that: compared with the prior art, the utility model, its beneficial effect lies in: (1) the color screen is used for replacing a dot matrix screen of a traditional microcomputer protection device, so that personalized requirements brought forward by users in certain scenes can be met; (2) background pictures, complex patterns and the like can be configured independently, and more intelligent and attractive man-machine interaction is realized; (3) the simulation serial port is used for establishing communication, a transmission mechanism can be determined by self, and the influence of the increase of the communication message quantity on the operation of the device is reduced.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is the utility model discloses well serial ports color screen's connection schematic diagram.

Detailed Description

The invention is described in further detail below with reference to specific embodiments and the accompanying drawings.

As shown in fig. 1, the utility model comprises a central controller CPU, a man-machine interface, a FLASH module, a power conversion module, a relay, a current-voltage transformer and a remote signaling input module, wherein the central controller CPU collects the ac input of the current-voltage transformer through a built-in ADC, judges the state of the remote signaling input module through an I/O interface, and controls the opening and closing of the relay; the CPU of the central controller carries out standard protocol communication through a serial port and an Ethernet port. In the present embodiment, the central controller CPU employs the STM32 series. The FLASH module, the power supply conversion module, the relay, the current and voltage transformer and the remote signaling input module are respectively connected with the Central Processing Unit (CPU). The human-computer interaction interface adopts a serial port color screen and controls the serial port color screen to communicate with the outside through a protocol message; one end of the serial port color screen is in communication connection with the Central Processing Unit (CPU), and the other end of the serial port color screen is connected with the power supply conversion module. The power supply conversion module provides working power supplies for the Central Processing Unit (CPU) and other peripheral components, including power supplies of 24V, 5V, 3.3V and 24V, and the FLASH module is used for storing device setting information and executing fault alarm; the current-voltage transformer is used for converting alternating voltage and current and converting input large current and high voltage into small voltage signals.

As shown in fig. 2, the serial color screen is in communication connection with the CPU through the analog serial port, and the connection established by using the analog serial port has an advantage that the transmission mechanism can be determined by combining a timer. The minimum transmission unit of the 232 and 485 serial ports is one byte, and the simulation serial port can be controlled to be the minimum transmission unit which is to complete the transmission of one bit of data by one interruption, so that the influence of the message volume brought by the serial port communication on other functions of the device in normal operation can be reduced. In this embodiment, the serial color screen adopts DMT64480T056 model of diwentech, and the hardware interface of the serial color screen selects TTL level mode through a jumper. The BUSY pin of the serial color screen is undefined, DOUT and DIN are respectively serial output and input, and the control of the serial color screen is realized through the communication of a specific protocol message, so that the I/O interface connecting the DOUT and DIN pins to the CPU of the central controller simulates serial communication through a pull-up level and a pull-down level. The microcomputer protection device completes the color screen control functions of page switching, data transmission, text transmission and the like through messages, and the serial port color screen can present rich colors and complex patterns, realizes flexible configuration and meets the personalized requirements of users.

To sum up, the utility model discloses replace computer protection device's traditional dot matrix screen for serial ports color screen, can realize more intelligent pleasing to the eye man-machine interaction, in addition, use the simulation serial ports to replace the connection that the hardware serial ports established CPU and color screen, can reduce the time that the device operation was once interrupted in the color screen communication, guarantee that the device is stable smooth operation.

Claims

1. A microcomputer protection device using a serial port color screen comprises a Central Processing Unit (CPU) and a human-computer interaction interface, and is characterized in that: the Central Processing Unit (CPU) is connected with the Central Processing Unit (CPU) and is used for collecting alternating current input of the current-voltage transformer, judging the state of the remote signaling input module and controlling switching-off and switching-on of the relay; the power supply conversion module provides a working power supply for the Central Processing Unit (CPU), and the FLASH module is used for storing device constant value information and executing fault alarm; the human-computer interaction interface adopts a serial port color screen and controls the serial port color screen to communicate with the outside through a protocol message; one end of the serial port color screen is in communication connection with the Central Processing Unit (CPU), and the other end of the serial port color screen is connected with the power supply conversion module.

2. The microcomputer protection device using the serial port color screen as claimed in claim 1, wherein: one end of the serial port color screen is in communication connection with the Central Processing Unit (CPU) through the analog serial port.

3. The microcomputer protection device using the serial port color screen as claimed in claim 1, wherein: the Central Processing Unit (CPU) collects alternating current input of the current-voltage transformer through the built-in analog-to-digital converter (ADC), and judges the state of the remote signaling input module through the I/O interface.

4. The microcomputer protection device using the serial port color screen as claimed in claim 1, wherein: and the CPU of the central controller carries out standard protocol communication through a serial port and an Ethernet port.

5. The microcomputer protection device using the serial port color screen as claimed in claim 1, wherein: and the hardware interface of the serial port color screen selects a TTL level mode through a jumper.

6. The microcomputer protection device using the serial port color screen as claimed in claim 5, wherein: the serial port color screen adopts a DMT64480T056 model.

7. The microcomputer protection device using the serial port color screen as claimed in claim 1, wherein: the central controller CPU is of the STM32 type.