Industrial application current circuit breaker based on LCD display interaction management

Abstract

The utility model discloses an industrial application current breaker based on LCD display interaction management, comprising an input power supply which is connected with a single-chip microcomputer through an input voltage detection circuit and a multipath power electronic switch circuit; each power electronic switch circuit in the multiple power electronic switches inputs detected values to the single-chip microcomputer through a voltage detection circuit and a current detection circuit of the power electronic switch circuit. The output end of the single-chip microcomputer is connected with the LCD display module after passing through the LCD display screen backlight control switch circuit. The input end of the single-chip microcomputer is further connected with a panel operation switch and a multi-channel reset switch. According to the utility model, the LCD display screen and the panel operation switch are additionally arranged on the current circuit breaker, the LCD display screen can display various parameter indexes of the current circuit breaker, and a user can set and inquire various parameters of the current circuit breaker through the panel operation switch; and compared with a dial switch, the LCD display module and the panel operation switch are more cost-saving and space-saving, so that the equipment cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, and in particular to an industrial application current circuit breaker based on LCD display interactive management. Background Art

[0002] Industrial application circuit breakers are mainly used in the industrial automation industry. Users can set the current limiting threshold for each output power supply through the DIP switch. The circuit breaker provides overload, short circuit, overvoltage, undervoltage, overtemperature protection and restart operation.

[0003] However, the current circuit breakers have the following shortcomings: 1. Using a dip switch to set the threshold current of the circuit breaker is inconvenient to operate, and the dip switch is expensive. 2. The user can only know whether the output power is normal or faulty through the red and green indicator lights on the panel, and cannot quickly locate the specific cause of the fault, such as over / under voltage protection, overcurrent protection, short circuit protection, overtemperature protection, etc. 3. The voltage and current values ​​and working status of each output power cannot be observed in real time and intuitively through the operation panel. Summary of the invention

[0004] In response to the above-mentioned technical problems, the present technical solution provides an industrial application current circuit breaker based on LCD display interactive management. An LCD display screen is added to the current circuit breaker, so that the current circuit breaker can not only be used for setting the current limiting threshold of each channel power supply and circuit protection, but also can be conveniently operated by users to set the circuit breaker through the LCD display screen added to the control panel of the current circuit breaker, and the operating parameters of each output power supply can be queried in real time through the LCD display screen. When a circuit fails, the cause of the fault can be directly displayed through the LCD; it can effectively solve the above-mentioned problems.

[0005] The utility model is realized by the following technical solutions:

[0006] An industrial current breaker based on LCD display interactive management comprises an input power supply, which is connected to a single-chip microcomputer through an input voltage detection circuit and a multi-channel power electronic switch circuit; each power electronic switch circuit in the multi-channel power electronic switch inputs a detected value to the single-chip microcomputer through its own voltage detection circuit and current detection circuit; the output end of the single-chip microcomputer is connected to an LCD display module through an LCD display backlight control switch circuit; the input end of the single-chip microcomputer is also connected to a panel operation switch and a multi-channel reset switch.

[0007] Furthermore, the input voltage detection circuit, the voltage detection circuit and the current detection circuit are all connected to the single-chip microcomputer through the ADC port; and the multiple power electronic switches are respectively connected to the single-chip microcomputer through the GPIO port.

[0008] Furthermore, the single chip microcomputer is provided with at least 17 GPIO ports with ADC function and a built-in EEPROM memory with a capacity of not less than 20Kbit.

[0009] Furthermore, the multi-channel power electronic switches all use high-side power electronic switches with diagnostic functions, and the power electronic switches with diagnostic functions use power electronic switches with model BTS6143D.

[0010] Furthermore, the current detection circuit passes the mirror current of the power electronic switch through a switch diode and a high-precision resistor to obtain a corresponding analog current value and provide it to the single-chip microcomputer.

[0011] Furthermore, the input voltage detection circuit and the voltage detection circuit use a resistor divider, and use two upper and lower resistors to divide the 24V power supply voltage into 2.18V and transmit it to the microcontroller; the voltage value obtained by the resistor divider will change according to the change of the power supply voltage value, thereby realizing real-time detection of the power supply voltage value.

[0012] Furthermore, the input power source adopts a 24V DC power source, and the input power source is connected to the power electronic switch through a disposable fuse, and the disposable fuse is a disposable fuse with a rated current of 15A.

[0013] Furthermore, the LCD display module is composed of a 1.54-inch IPS LCD display and an ST7789 driver chip; the single-chip microcomputer transmits the content to be displayed to the LCD display via an SPI signal.

[0014] Furthermore, the panel operation switch adopts a key switch, which includes five keys: up, down, left, right and select. The current circuit breaker is queried and set by operating the key switch.

[0015] Furthermore, the multi-channel reset switch corresponds to the multi-channel power electronic switch circuit. When a power electronic switch circuit in the multi-channel power electronic switch circuit fails on site, it can be quickly reset and restarted through the reset switch.

[0016] Beneficial Effects

[0017] The industrial current circuit breaker based on LCD display interactive management proposed by the utility model has the following beneficial effects compared with the prior art:

[0018] (1) This technical solution adds an LCD display and a panel operation switch to the circuit breaker. The LCD display can display various parameter indicators of the circuit breaker, and the panel operation switch includes up, down, left, right and selection buttons. Users can set and query various parameters of the circuit breaker through the panel operation switch.

[0019] (2) This technical solution allows users to view the voltage and current values ​​of each power supply output in real time through the LCD display. When a fault occurs, the undervoltage protection, overcurrent protection, short circuit protection, overtemperature protection and other problems can be quickly located, providing a good human-computer interaction experience.

[0020] (3) The LCD display module and panel operation switch of this technical solution save more cost and space than the dip switch, thus reducing the equipment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic block diagram of the overall structure of the utility model.

[0022] Figure 2 The figure is a schematic diagram of the working circuit of the medium power electronic switch of the utility model.

[0023] Figure 3 It is a circuit diagram of the LCD display module in the utility model. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Under the premise of not departing from the design concept of the utility model, various modifications and improvements made by ordinary people in this field to the technical solutions of the utility model should fall within the protection scope of the utility model.

[0025] Embodiment 1:

[0026] like Figure 1 As shown, an industrial current circuit breaker based on LCD display interactive management includes an input power supply, which uses a 24V DC input power supply. The 24V DC input power supply is connected to the single-chip microcomputer through an input voltage detection circuit. At the same time, the 24V DC input power supply is connected to the single-chip microcomputer through an 8-way power electronic switch circuit.

[0027] The 24V DC input power supply is connected to the corresponding 8 electronic power switches through 8 one-time fuses, so that the input power supply is respectively input to the 8 electronic power switches through the 8 one-time fuses. The one-time fuse is a one-time fuse with a rated current of 15A, which provides protection for the power supply of the 8 channels respectively.

[0028] The 8 output voltages of the 8 electronic power switches are input into the single chip microcomputer through the 8 voltage detection circuits, and the 8 output currents of the 8 electronic power switches are input into the single chip microcomputer through the 8 current detection circuits.

[0029] The single-chip microcomputer has at least 17 GPIO ports with ADC function (taking an 8-way current circuit breaker as an example), and has a built-in EEPROM memory with a capacity of not less than 20Kbit. The single-chip microcomputer is connected to the 9-way voltage detection circuit through the ADC port; the 8-way current detection circuit is connected to the single-chip microcomputer through the ADC port.

[0030] The output end of the single-chip microcomputer is connected with the LCD display backlight control switch and the LCD display module, and the LCD display module is connected with the LCD display backlight control switch; the single-chip microcomputer is connected to the LCD display backlight control switch circuit, and the LCD display backlight control switch circuit is connected to the LCD display module. The single-chip microcomputer is connected to the LCD display module through the SPI and GPIO ports; the single-chip microcomputer is connected to the LCD display backlight control switch circuit through the GPIO port.

[0031] The input end of the single-chip microcomputer is also connected to a panel operation switch and an 8-channel reset switch; the single-chip microcomputer is connected to the 8 reset switches through a GPIO port; the single-chip microcomputer is connected to the panel operation switch through a GPIO port.

[0032] The panel operation switch adopts a key switch, which includes five keys: up, down, left, right and select. The current circuit breaker can be queried and set by operating the key switch.

[0033] The eight reset switches correspond to the eight power electronic switch circuits. When a power electronic switch circuit among the eight power electronic switch circuits fails on site, the reset switch can be used to quickly reset and restart.

[0034] like Figure 2 As shown, the multi-channel power electronic switches all use high-side power electronic switches with diagnostic functions, and the power electronic switches with diagnostic functions use power electronic switches of model BTS6143D; the current detection circuit passes the mirror current of the power electronic switch BTS6143D through a switching diode and a high-precision resistor to obtain the corresponding analog current value and provide it to the microcontroller.

[0035] The 8-way current detection circuit passes the mirror current value of 8 power electronic switches (output current value / mirror current value=10000) through a switching diode and a high-precision resistor, and obtains an analog voltage signal to provide it to the ADC sampling module of the microcontroller, so the microcontroller can monitor the output current status of each channel point in real time.

[0036] The input voltage detection circuit and the voltage detection circuit, that is, the 9-way voltage detection circuit, both use a resistor divider. The 9-way voltage detection circuit is a resistor divider. After the upper and lower resistors 100K and 10K are connected in series, the 24V voltage is divided into 2.18V and provided to the ADC sampling module of the microcontroller. The voltage divided by the resistor divider will change according to the change of the real-time voltage value, so the microcontroller can monitor the voltage value of each channel point in real time. If the output voltage value of a channel is lower than 20V, the real-time current of the channel is greater than the preset current, and the output of the channel is closed after 16ms.

[0037] like Figure 3 As shown in the figure, the LCD display module is composed of a 1.54-inch IPS LCD display and an ST7789 driver chip; the MCU transmits the content to be displayed to the LCD display through the SPI signal and the LCD display. The MCU controls the operation of the LCD display through the SPI signal, the control signal and the LCD display backlight control switch. Combined with the panel operation switch, the user can simply and intuitively set the current circuit breaker and view the current operating parameters of each channel in real time through the LCD display, providing users with a better human-computer interaction experience.

[0038] The specific working process is as follows: the 24V DC input power supply is connected to 8 electronic power switches through 8 disposable fuses; the 8 output voltages of the 8 electronic power switches are respectively input into the microcontroller through 8 voltage detection circuits, and the 8 output currents of the 8 electronic power switches are respectively input into the microcontroller through 8 current detection circuits.

[0039] The ADC module of the single-chip microcomputer collects the analog voltage signals output by the input voltage detection circuit, the 8-way output voltage detection circuit and the 8-way current detection circuit. The output voltage and current values ​​of the corresponding channels can be calculated through the collected analog voltage signals.

[0040] The single-chip microcomputer is connected to the display module through SPI signals and control signals; the single-chip microcomputer controls the LCD display backlight switch through the GPIO port to control the opening and closing of the LCD display; the single-chip microcomputer is connected to 8 reset switches through the GPIO port.

[0041] The microcontroller chip has a built-in eeprom to save user data; users can query and set operations through the panel operation switch and display module. The built-in program of the microcontroller presets the current limiting threshold of 1-10 amperes. The maximum output current value of each channel is 10 amperes. The current threshold can be preset through the panel operation switch. The panel operation switch consists of up, down, left and right buttons, which can accurately set the required current threshold.

[0042] The real-time current and voltage values ​​of each output power supply can be queried. When a fault occurs, the specific cause of the fault can be immediately viewed through the LCD display, which can quickly troubleshoot the fault and improve work efficiency, saving time for users.

Claims

1. An industrial current circuit breaker based on LCD display interactive management, comprising an input power supply, the input power supply is connected to a single-chip microcomputer through an input voltage detection circuit and a multi-channel power electronic switch circuit; characterized in that: Each power electronic switch circuit in the multi-channel power electronic switch inputs the detected value into the single-chip microcomputer through its own voltage detection circuit and current detection circuit; the output end of the single-chip microcomputer is connected to the LCD display module through the LCD display backlight control switch circuit; the input end of the single-chip microcomputer is also connected to the panel operation switch and the multi-channel reset switch.

2. The industrial application current circuit breaker based on LCD display interactive management according to claim 1, characterized in that: The input voltage detection circuit, the voltage detection circuit and the current detection circuit are all connected to the single-chip microcomputer through the ADC port; the multiple power electronic switches are respectively connected to the single-chip microcomputer through the GPIO port.

3. An industrial application current circuit breaker based on LCD display interactive management according to claim 1 or 2, characterized in that: The single chip microcomputer is provided with at least 17 GPIO ports with ADC function and is built with an EEPROM memory with a capacity of not less than 20Kbit.

4. The industrial application current circuit breaker based on LCD display interactive management according to claim 1, characterized in that: The multi-channel power electronic switches all adopt high-side power electronic switches with diagnostic functions, and the power electronic switches with diagnostic functions adopt power electronic switches with model BTS6143D.

5. An industrial current circuit breaker based on LCD display interactive management according to claim 1 or 4, characterized in that: The current detection circuit passes the mirror current of the power electronic switch through a switch diode and a high-precision resistor to obtain a corresponding analog current value and provide it to the single-chip microcomputer.

6. The industrial application current circuit breaker based on LCD display interactive management according to claim 1, characterized in that: The input voltage detection circuit and the voltage detection circuit use a resistor divider, and use two upper and lower resistors to divide the 24V power supply voltage into 2.18V and transmit it to the microcontroller; the voltage value obtained by the resistor divider will change according to the change of the power supply voltage value, thereby realizing real-time detection of the power supply voltage value.

7. The industrial application current circuit breaker based on LCD display interactive management according to claim 1, characterized in that: The input power source adopts a 24V DC power source, and the input power source is connected to the power electronic switch through a disposable fuse, and the disposable fuse is a disposable fuse with a rated current of 15A.

8. The industrial application current circuit breaker based on LCD display interactive management according to claim 1, characterized in that: The single chip microcomputer transmits the content to be displayed to the LCD display screen through the SPI signal and the LCD display screen.

9. The industrial application current circuit breaker based on LCD display interactive management according to claim 1, characterized in that: The panel operation switch adopts a key switch, which includes five keys: up, down, left, right and select. The current circuit breaker is queried and set by operating the key switch.

10. The industrial application current circuit breaker based on LCD display interactive management according to claim 1, characterized in that: The multi-channel reset switch corresponds to the multi-channel power electronic switch circuit. When a power electronic switch circuit in the multi-channel power electronic switch circuit fails on site, it can be quickly reset and restarted through the reset switch.

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