This utility model relates to the field of instrument technology, specifically an intelligent digital display instrument based on SPD protection system.

This utility model relates to the field of instrument technology

specifically an intelligent digital display instrument based on SPD protection system.

Background Technology:

 

Generally, multifunctional power meters can measure and display various common electrical parameters, such as voltage, current, active power, reactive power, apparent power, frequency, power factor, active energy, reactive energy, etc. Existing multifunctional power meters mostly use digital displays and indicator lights, along with markings on the product casing to distinguish and display the values, magnitudes, and units of various electrical measurement parameters. The development of multifunctional power meters has also placed higher demands on the power module of power meters: low voltage ripple, high load capacity, small size. However, existing digital display meters commonly have the following defects: 1. Current digital display meters on the market have relatively simple functions in low-end products, which cannot meet requirements; high-end meter products are expensive and even difficult for users to afford. 2. Existing low-end meters in the market generally do not have 485 communication function, making it inconvenient to communicate with control devices, thus not suitable for coordination with control devices. 3. A digital display meter can only display one signal, making it difficult to meet the needs of different occasions.

 

Technical Elements:

 

The technical problem to be solved by this utility model is to overcome the defects of existing technologies and provide an intelligent digital display instrument based on the SPD protection system.

 

To solve the above technical problem, this utility model provides the following technical solution: an intelligent digital display instrument based on the SPD protection system, including: the main body of the digital display instrument, which consists of a casing, control panel, terminal ports, display, and internal control device. The control device includes the SPD protection system, measuring module, memory, LED drive control module, keyboard input module, 485 communication module, and power module. The SPI communication interface of the measuring module is connected to the first general I/O port of the SPD protection system, the serial port of the memory is connected to the I2C serial interface of the SPD protection system, the serial port of the LED drive control module is connected to the second general I/O port of the SPD protection system, the output end of the keyboard input module is connected to the third general I/O port of the SPD protection system, and the data line of the 485 communication module is connected to the UART serial port of the SPD protection system.

 

Furthermore, the SPD protection system is equipped with sensors and output ports, including current sensor, voltage sensor, temperature sensor, and pressure sensor. The output ports include current output port, voltage output port, temperature output port, and pressure output port.

 

Further, the output ends of the current output port, voltage output port, temperature output port, and pressure output port are connected to the display.

 

Further, the LED drive control module is connected to LED digital display.

 

Further, the SPD protection system is connected with switch quantity input module and relay output module.

 

Further, the measuring module is equipped with three-phase voltage acquisition module and three-phase current acquisition module.

 

Further, the display is an LCD display, the memory uses EEPROM and Flash ROM memory, and the CPU in the SPD protection system adopts an ARM9 core microprocessor, model AT91RM9200.

 

Advantages of this utility model compared to existing technologies:

 

1. As a simple instrument, this digital display instrument has logic control and signal transmission functions that ordinary simple instruments do not have.

 

2. This digital display instrument can form different instruments through parameter configuration to meet the needs of different occasions.

 

3. This digital display instrument has a price advantage, offering more functions than existing low-end instruments on the market while being priced at the same level.

 

4. This digital display instrument can send collected signals to control devices through 485 communication, providing convenience for signal collection by control devices.

 

Specific Implementations:

 

In order to make the purpose, technical solution, and advantages of this utility model clearer, the utility model is further detailed with reference to the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not intended to limit the utility model.

 

As shown in Figures 1-5, an intelligent digital display instrument based on the SPD protection system includes: the main body of the digital display instrument, which consists of a casing, control panel, terminal ports, display, and internal control device. The control device includes the SPD protection system, measuring module, memory, LED drive control module, keyboard input module, 485 communication module, and power module. The SPI communication interface of the measuring module is connected to the first general I/O port of the SPD protection system, the serial port of the memory is connected to the I2C serial interface of the SPD protection system, the serial port of the LED drive control module is connected to the second general I/O port of the SPD protection system, the output end of the keyboard input module is connected to the third general I/O port of the SPD protection system, and the data line of the 485 communication module is connected to the UART serial port of the SPD protection system.

 

The SPD protection system is equipped with sensors and output ports, including current sensor, voltage sensor, temperature sensor, and pressure sensor. The output ports include current output port, voltage output port, temperature output port, and pressure output port. The output ends of the current output port, voltage output port, temperature output port, and pressure output port are connected to the display. The LED drive control module is connected to LED digital display. The SPD protection system is connected with switch quantity input module and relay output module. The measuring module is equipped with three-phase voltage acquisition module and three-phase current acquisition module. The display is an LCD display, the memory uses EEPROM and Flash ROM memory, and the CPU in the SPD protection system adopts an ARM9 core microprocessor, model AT91RM9200.

 

Principle and Advantages of this utility model: This utility model is an intelligent digital display instrument based on the SPD protection system. When used, parameters can be input through the keyboard input module to select the content displayed on the display, i.e., the content output from the voltage output port, current output port, temperature output port, and pressure output port. This allows the same digital display instrument to be configured as a voltmeter, ammeter, pressure gauge, thermometer, etc., making it more functional and suitable for different occasions. Through the 485 communication module, it can communicate with other devices, providing convenience for signal collection by control devices. The relay output module has two ports for upper and lower limit alarm respectively. In this way, an alarm can be triggered when the signal exceeds the upper or lower limit.

 

The above description is only the preferred embodiment of this utility model, and is not intended to limit the scope of this utility model. Any modifications, equivalent replacements, improvements made within the spirit and principle of this utility model should be included within the protection scope of this utility model.