CN203630236U - Safety detection and control system used in electric power field - Google Patents

Abstract

The utility model discloses a safety measurement and control system applied in the field of electric power, which is mainly composed of a remote control unit and a main control unit connected to each other through a wireless network, and the main control unit is composed of a voltage sensor, a main control module circuit connected in sequence , an isolation circuit and an analog switch circuit, and the remote control unit is composed of a radio frequency transceiver and a remote control circuit connected to each other. The utility model has a reasonable design and proposes the design of a single-chip microcomputer, which is used as the core of the safety measurement and control system , its main function can not only process a variety of system-related signals, but also has the characteristics of simple connection structure, low system energy consumption, and high work efficiency.

Description

A Safety Measurement and Control System Applied in Electric Power Field

technical field

The utility model relates to the field of measurement and control, in particular to a safety measurement and control system applied in the field of electric power.

Background technique

At present, the monitoring of power quality is usually carried out by testers at the site, and the test takes a long time, and the operation is carried out at the site, and each time it is only a single point of monitoring. Multi-point automatic monitoring is an efficient monitoring method and a development trend. The main means of power quality management is to strengthen monitoring, find problems, and take solutions to problems. In recent years, my country's power system has developed rapidly, and many substations and power supply stations are undergoing automation and unattended transformation. Therefore, the application of state monitoring and control technology and the development of new state monitoring and control technology in power systems such as substations have become important. It is one of the most important tasks in the research of my country's electric power integrated automation system.

Utility model content

The purpose of this utility model is to provide a safety measurement and control system applied in the field of electric power. The design is reasonable, and the design of a single-chip microcomputer is proposed, and it is used as the core of the safety measurement and control system. Its main function can not only handle various system-related The signal also has the characteristics of simple connection structure, low system energy consumption and high work efficiency.

The utility model is realized through the following technical solutions: a safety measurement and control system applied in the field of electric power, which is mainly composed of a remote control unit and a main control unit connected to each other through a wireless network, and the main control unit is composed of voltage sensors connected in sequence , a main control module circuit, an isolation circuit and an analog switch circuit, and the remote control unit is composed of a radio frequency transceiver and a remote control circuit connected to each other.

In order to better realize the utility model, the main control module circuit is mainly composed of an A/D data converter, a main control chip, and a radio frequency transceiver connected in sequence, and the A/D data converter is connected to a voltage sensor. The main control chip is connected to the analog switch circuit through the isolation circuit, and both the voltage sensor and the analog switch circuit are connected to the 220V AC high voltage at the same time.

In the present invention, the model of the main control chip is preferably STC89C52.

In the present utility model, the A/D data converter is preferably ADS7867.

In the present invention, the model of the remote control processing chip is preferably AT89C51.

In the utility model, the liquid crystal display is preferably LED1602.

In the utility model, the isolation circuit chip adopts ADuM7241.

In order to better realize the utility model, the remote control circuit is composed of a keyboard matrix, a remote control processing chip and a liquid crystal display screen connected in sequence, and the remote control processing chip is connected to a radio frequency transceiver.

In this utility model, the model of the radio frequency transceiver is preferably NRF905.

Its working principle is that the sensor is connected to 220V high voltage to sense the voltage of its line, and then the data is processed by the A/D data converter and then sent to the main control chip for in-depth processing, and then sent to the remote control unit through the radio frequency transceiver, the remote control unit The radio frequency transceiver processes the received data through the remote control chip, and then displays it on the LCD screen. After the staff performs real-time operations through the keyboard matrix, the data processed by the remote control processing chip is sent out through the radio frequency transceiver, and is sent by the main control After the radio frequency transceiver of the unit is received, it is further processed by the main control chip, and then it is operated in real time through the isolation circuit and the analog switch connected to the 220V high voltage. The functions of each part in this process are: in the main control unit, the A/D digital-to-analog conversion sub-block is connected to the voltage sensor module to receive the analog signal from the voltage sensor; the main control chip communicates with the analog high-voltage switch through the isolation circuit The modules are connected to each other and send high and low levels to control the closed state of the switch circuit; the main control chip is also connected to the radio frequency transceiver to send the processed voltage value of the high-voltage wire to the user, and the remote control unit transmits control commands through the wireless duplex protocol to the The main control module then sends the measured voltage value back to the remote controller through the wireless network, and then displays the measured voltage value.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

1. The design of the utility model is reasonable. The single-chip microcomputer is used as the core of the power safety monitoring system. Its main function is to process various signals related to the system. It can not only achieve high precision data processing, but also has low power consumption and strong practicality.

2. The system is small in size, low in power consumption, low in cost and high in reliability.

3. On the one hand, this system reduces the chances of the power workers to directly contact with the accident source, and ensures the personal safety of the power workers; Reduce the financial expenditure of the substation.

Description of drawings

Fig. 1 is a functional block diagram of the utility model.

Detailed ways

The utility model will be further described in detail below in conjunction with the examples, but the implementation of the utility model is not limited thereto.

Example:

A safety measurement and control system applied in the electric power field, as shown in Figure 1, is mainly composed of a remote control unit and a main control unit connected to each other through a wireless network, and the main control unit is mainly composed of voltage sensors connected in sequence, and The A/D data converter ADS7867 is connected to the main control chip STC89C52, the main control module circuit composed of the main control chip STC89C52 bus connected to the radio frequency transceiver NRF905, the isolation circuit composed of the ADuM7241 chip and the analog switch circuit. The A/D The data converter ADS7867 is connected to the voltage sensor, the main control chip STC89C52 is connected to the analog switch circuit through the ADuM7241 chip, the voltage sensor and the analog switch circuit are connected to the 220V AC high voltage at the same time, and the remote control unit is connected to each other The radio frequency transceiver NRF905 and the remote control circuit composed of sequentially connected keyboard matrix, remote control processing chip AT89C51, and liquid crystal display LED1602, the described remote control processing chip AT89C51 is connected to the radio frequency transceiver NRF905.

Its working principle is that the sensor is connected to 220V high voltage to sense the voltage of its line, and then the data is processed by the A/D data converter ADS7867, and then sent to the main control chip STC89C52 for in-depth processing, and then sent to the remote control unit through the radio frequency transceiver NRF905. The radio frequency transceiver NRF905 of the remote control unit processes the received data through the remote control chip AT89C51, and then displays it on the LCD screen LED1602. After being received by the radio frequency transceiver NRF905 of the main control unit, it is further processed by the main control chip STC89C52, and then it is operated in real time through an analog switch connected to a 220V high voltage after an isolation circuit. The functions of each part in this process are: in the main control unit, the A/D digital-to-analog conversion sub-block is connected to the voltage sensor module to receive the analog signal from the voltage sensor; the main control chip communicates with the analog high-voltage switch through the isolation circuit The modules are connected to each other and send high and low levels to control the closed state of the switch circuit; the main control chip is also connected to the radio frequency transceiver to send the processed voltage value of the high-voltage wire to the user, and the remote control unit transmits control commands through the wireless duplex protocol to the The main control module then sends the measured voltage value back to the remote controller through the wireless network, and then displays the measured voltage value.

The utility model has a reasonable design, and adopts a single-chip microcomputer as the core of the electric power safety monitoring system. sex.

The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any simple modification or equivalent change made to the above embodiments according to the technical essence of the utility model falls within the scope of the present utility model. Within the protection scope of the present utility model. the

Claims (9)

1. A safety measurement and control system applied to the electric power field is characterized in that: it is mainly composed of a remote control unit and a main control unit connected to each other through a wireless network, and its described main control unit is composed of a voltage sensor and a main control module connected in sequence The remote control unit is composed of a radio frequency transceiver and a remote control circuit connected to each other. 2. A kind of safety measurement and control system applied to the electric power field according to claim 1, characterized in that: the main control module circuit is mainly composed of A/D data converters, main control chips, and radio frequency transceivers connected in sequence , the A/D data converter is connected to a voltage sensor, the main control chip is connected to an analog switch circuit through an isolation circuit, and both the voltage sensor and the analog switch circuit are connected to 220V AC high voltage at the same time. 3. A safety measurement and control system applied in the electric power field according to claim 2, characterized in that: the model of the main control chip is STC89C52. 4. A safety measurement and control system applied in the electric power field according to claim 2, characterized in that: the A/D data converter is ADS7867. 5. A safety measurement and control system applied in the electric power field according to claim 2, characterized in that: the model of the remote control processing chip is AT89C51. 6. A safety measurement and control system applied in the electric power field according to claim 2, characterized in that: said liquid crystal display screen is LED1602. 7. A safety measurement and control system applied in the electric power field according to claim 1 or 2, characterized in that: ADuM7241 is used as the isolation circuit chip. 8. A safety measurement and control system applied in the electric power field according to claim 1, characterized in that: the remote control circuit is composed of a keyboard matrix, a remote control processing chip and a liquid crystal display connected in sequence, and the remote control The processing chip is connected to the radio frequency transceiver. 9. A safety measurement and control system applied in the electric power field according to any one of claims 1, 2, and 8, characterized in that: the model of the radio frequency transceiver is NRF905.

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