CN203405529U - A small current grounding line selection device integrated with a micro-printer - Google Patents

Abstract

The utility model discloses a small current grounding line selection device integrated with a miniature printer. The device can record the parameter fixed values and the grounding fault information better and print the corresponding data via the miniature printer for operation recording and fault analysis, thereby avoiding the inconvenience and error brought by recording data artificially, and improving the work efficiency and reliability. According to the characteristics and demands of the actual application, the small current grounding line selection device integrated with the miniature printer of the utility model is based on the embedded miniature printer, carries the first and second grades of Chinese characters GB codes by itself, is abundant in printing functions, is easy to realize, also has the characteristics of being flexible and convenient to install, being high in cost performance, etc., is applied to the small current grounding line selection devices, is fully verified in the actual application, and obtains a good effect.

Description

A small current grounding line selection device integrated with a micro-printer

technical field

The utility model relates to a small current grounding line selection device with an improved structure.

Background technique

my country's distribution network is mostly a small current grounding system. With the continuous development of the national economy, the scale of the distribution network is expanding day by day. 1 to 2 hours, but if it is not dealt with in time, it is very easy to cause a phase-to-phase short circuit, which will expand the accident and affect the reliability of power supply. At the same time, in actual work, in order to better record the change of parameter setting and ground fault information, it is necessary to print out the corresponding parameters and fault information through a micro-printer for reference and analysis, avoiding the inconvenience of manual data recording with error. However, the micro-printer used in conjunction with the existing small current grounding line selection device needs to be specially customized and purchased, which is costly and inconvenient to use.

Therefore, a new technical solution is needed to solve the above problems.

Utility model content

The technical problem to be solved by the utility model is to provide a low-current grounding line selection device integrated with a micro-printer that provides a convenient printing function and has a compact structure and low cost.

In order to achieve the above purpose, the utility model integrates the small current grounding line selection device of the micro-printer and can adopt the following technical scheme:

A small current grounding line selection device integrated with a micro-printer, comprising a housing, a display installed on the front panel of the housing, and a micro-printer installed on the front panel of the housing; an embedded PC module is arranged inside the housing , and the data bus connecting the embedded PC module and the miniature printer.

Compared with the background technology, the utility model integrates the small current grounding line selection device of the micro-printer. By making the micro-printer compatible with the embedded PC module in the device, the two perform data interaction through the data bus, and then integrate the micro-printer function; the micro-printer can conveniently and instantly print parameter setting and grounding fault information, and the small-current grounding line selection device integrated with the micro-printer has a simple, compact structure and low cost.

This device can realize the function of parameter setting printing and fault information printing, which can be used for reference and analysis by operation and maintenance personnel. After the on-site operators complete the device parameter configuration, they can automatically print the setting parameters for backup and storage. The printed parameter settings specifically include: line selection algorithm-related settings, communication-related settings, program version information, etc. When a single-phase ground fault occurs in the distribution network, if the printer is turned on, the printer will automatically print out the fault information, including the grounding line number, the start and end time of grounding, the number of times of grounding, and the operating parameters of the system when the grounding occurs; if the printer is not turned on , you can enter the fault memory menu to choose to print the relevant fault information after the fault disappears. The printed fault information includes: the number of the line where the single-phase ground fault occurred, the start and end time of the fault, the duration of the fault, the characteristic variables of the fault line, and the statistics of the ground fault information, etc.

Further, the micro-printer interface definition includes data signal, busy signal, response signal, data strobe trigger signal, grounding, empty pin, error signal, self-test; Data exchange of three kinds of data: signal, status signal and print data information.

Further, the micro-printer is a micro-printer embedded in the front paper changing panel, which can be inserted into the front panel of the housing as a print output device, so operations such as paper changing can be completed without pulling out the entire printer, and the use is simple and convenient.

Description of drawings

Fig. 1 is the front view of the small current grounding line selection device integrated with the micro-printer of the utility model.

Fig. 2 is a schematic diagram of the hardware connection between the micro-printer and the embedded PC module in the utility model.

Fig. 3 is a schematic diagram of the interface definition of the micro-printer in the utility model.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, further set forth the utility model, should be understood that these embodiments are only used for illustrating the utility model and are not intended to limit the scope of the utility model, after having read the utility model, those skilled in the art will understand this utility model The modifications of various equivalent forms of the utility model all fall within the scope defined by the appended claims of the present application.

Please refer to Figure 1, the utility model discloses a small current grounding line selection device integrated with a micro-printer, including a housing, a display installed on the front panel of the housing, and a micro-printer installed on the front panel of the housing; An embedded PC module and a data bus connecting the embedded PC module and the micro-printer are arranged inside the housing. The micro-printer exchanges data with the embedded PC module through the data bus, including trigger signal, status signal and print data information. In this embodiment, the micro-printer is a micro-printer embedded in the front paper-changing panel, and this kind of micro-printer embedded in the front paper-changing panel can be inserted on the front panel of the housing as a printout device, so there is no need to pull out the entire printer Operations such as changing paper can be completed, and the operation is simple and convenient.

As shown in Figure 2, the core controller of the line selection device in the present invention adopts an embedded PC module, which is a CPU board-level module with a high-performance 32-bit embedded microprocessor as the core, fast speed, built-in The "watchdog" circuit has a perfect self-check function, strong anti-interference and self-recovery capabilities. In addition, the internal interface module of the micro-printer adopts a pin-type structure, which can be conveniently connected with the embedded PC module to form a complete system. The embedded PC module exchanges data with the micro-printer through the data bus, including trigger signal, status signal and print data information. The embedded PC module can receive the status information (BUSY, PSEL, PE, etc.) fed back by the micro-printer while outputting the printing data.

为应答信号；

为数据选通触发信号，上升沿时表示读入数据；GND接地；NC为空引脚；

为出错信号；PSEL和PE用于自检等。As shown in Figure 3, it is the description of the micro-printer interface definition in the utility model, wherein DB0-DB7 is a data signal; BUSY is a busy signal, and a high level indicates that the printer is "busy" and does not receive data;

for the response signal;

It is a data strobe trigger signal, and the rising edge indicates that the data is read; GND is grounded; NC is an empty pin;

It is an error signal; PSEL and PE are used for self-test, etc.

When using a micro-printer for printing jobs, after the embedded PC module sends a print command, the printer initializes and enters the Chinese character printing mode; the embedded PC module judges whether the printer is idle through the "busy" signal of the printer, and if "idle", the data Send it to the data bus; then judge whether the printer reads the data into the print buffer through the trigger signal; after all the data is read in, it will execute the print command and start printing the data in the buffer area.

Claims (3)

1. A small current grounding line selection device integrated with a micro-printer, characterized in that: it comprises a housing, a display mounted on the front panel of the housing, a micro-printer installed on the front panel of the housing; inside the housing An embedded PC module and a data bus connecting the embedded PC module and a micro-printer are provided. 2. The small current grounding line selection device integrated with a micro-printer according to claim 1, characterized in that: said micro-printer interface definition includes data signal, busy signal, response signal, data strobe trigger signal, grounding, empty Pin, error signal, self-test; the micro-printer exchanges data with the embedded PC module through the data bus, including trigger signal, status signal and print data information. 3. The small current grounding line selection device integrated with a micro-printer according to claim 1 or 2, characterized in that: the micro-printer is a micro-printer embedded in the front paper changing panel.

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