DC system monitoring device with lightning protection function

Abstract

The utility model relates to a direct current system monitoring device with a lightning protection function, which comprises a signal current module for receiving input current, performing current acquisition and then sending a current acquisition signal, and comprises a direct current acquisition module for acquiring the input current; the data processing module is used for receiving an output signal of the direct current acquisition module and carrying out data processing; the communication module is used for receiving and sending the current acquisition signal output by the data processing module; and the power supply protection module is used for receiving an input voltage and outputting a voltage signal to the signal current module as a working voltage of the signal current module after the input voltage passes through a protection circuit. According to the utility model, the two modules are arranged, so that electronic equipment can be monitored and protected from being damaged by natural disasters such as thunder and lightning in real time, and direct current data can be acquired for subsequent analysis at the same time.

Description

Technical Field

[0001] The utility model relates to the field of electronic circuits, in particular to a DC system monitoring device with a lightning protection function. Background Art

[0002] With the continuous development of electronic technology, various electronic devices have been widely used in various fields. However, natural disasters such as lightning and unstable DC current can damage electronic devices. To effectively protect electronic devices, power supply lightning protection and DC current stability are both important and practical monitoring data. In the existing technology, there is no device that combines these two functions to protect electronic devices. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model discloses a DC system monitoring device with a lightning protection function.

[0004] The technical solutions adopted in this utility model are as follows:

[0005] A DC system monitoring device with lightning protection function, comprising:

[0006] The signal current module receives the input current, performs current acquisition, and then sends a current acquisition signal, including: a DC current acquisition module to acquire the input current; a data processing module to receive the output signal of the DC current acquisition module and perform data processing; a communication module to receive and send the current acquisition signal output by the data processing module;

[0007] The power protection module receives an input voltage and outputs a voltage signal to the signal current module as an operating voltage of the signal current module after passing through a protection circuit.

[0008] A further technical solution is that the DC current acquisition module acquires DC current through a Hall chip.

[0009] A further technical solution is that the DC current input pin of the Hall chip is connected to the DC input terminal; the voltage output pin of the Hall chip outputs a signal to the data processing module through a voltage divider circuit.

[0010] Its further technical solution is that the data processing module includes a processing chip, the processing chip includes a signal input end connected to the signal output end of the DC current acquisition module; the processing chip also includes a signal transmission end connected to the signal input end of the communication module.

[0011] Its further technical solution is that the model of the processing chip of the data processing module is stm32f103c8t6.

[0012] A further technical solution is that the communication module remotely sends the current acquisition signal to the monitoring end through a 485 chip.

[0013] A further technical solution is that the power protection module includes a transient voltage suppression tube and a ceramic gas discharge tube connected in parallel between the input end and the output end of the power protection module.

[0014] Its further technical solution is that the power protection module includes a first transient voltage suppression tube, a second transient voltage suppression tube and a third transient voltage suppression tube; the cathode of the first transient voltage suppression tube is connected to the voltage input terminal of the power protection module, and the anode of the first transient voltage suppression tube is connected to the reference voltage terminal of the power protection module; the cathode of the second transient voltage suppression tube is connected to the voltage input terminal of the power protection module, and the anode of the second transient voltage suppression tube is connected to the protection ground terminal; the cathode of the third transient voltage suppression tube is connected to the reference voltage terminal of the power protection module, and the anode of the third transient voltage suppression tube is connected to the protection ground terminal.

[0015] A further technical solution is that an inductor is connected in series between the connection line between the transient voltage suppressor and the ceramic gas discharge tube.

[0016] The beneficial effects of the utility model are as follows:

[0017] The utility model is provided with two modules, one is a signal current module and the other is a power protection module. The signal current module can collect DC current and send the current collection signal to a remote monitoring end, such as a manual monitoring station or an automatic monitoring station, while the power protection module outputs a voltage signal to the signal current module after passing the input voltage through the protection circuit as the working voltage of the signal current module. This setting enables the power board to have the functions of power lightning protection and automatic current collection at the same time, so that the device can monitor and protect electronic equipment from damage caused by natural disasters such as lightning in real time, and at the same time collect DC current data for subsequent analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a block diagram of the circuit modules in an embodiment of the present utility model.

[0019] Figure 2 This is a circuit diagram of the DC current acquisition module in an embodiment of the present utility model.

[0020] Figure 3 This is a circuit diagram of the data processing module in an embodiment of the present utility model.

[0021] Figure 4 This is a circuit diagram of the communication module in an embodiment of the present utility model.

[0022] Figure 5 This is a circuit diagram of the power protection module in an embodiment of the present utility model.

[0023] Figure 6 FIG. 4 is a circuit diagram of a power conversion module in an embodiment of the present utility model. DETAILED DESCRIPTION

[0024] The specific implementation of the present utility model will be described below with reference to the accompanying drawings.

[0025] Figure 1 FIG. 1 is a block diagram of a circuit module in an embodiment of the present utility model. Figure 1 As shown, the DC system monitoring device with lightning protection function disclosed in this embodiment includes a signal current module and a power protection module. The power protection module receives the power supply voltage and provides the operating voltage for the signal current module after voltage reduction and voltage stabilization. The signal current module receives the input current, collects the current, and then transmits the current collection signal for remote DC current monitoring.

[0026] Specifically, the signal current module includes a DC current acquisition module, a data processing module, and a power protection module. The DC current acquisition module is used to acquire input current. The input of the data processing module is connected to the output of the DC current acquisition module. The data processing module receives and processes the output signal of the DC current acquisition module. The input of the communication module is connected to the output of the data processing module. The communication module receives and transmits the current acquisition signal output by the data processing module, enabling remote monitoring of the DC current.

[0027] The power protection module receives input voltage and, after passing through the protection circuit, outputs a voltage signal to the signal current module as the operating voltage. The protection circuit is used to provide lightning protection for the input voltage signal.

[0028] Figure 2 FIG. 1 is a circuit diagram of a DC current acquisition module in an embodiment of the present utility model. Figure 2 As shown, the DC current acquisition module includes a Hall effect chip U2. The DC current acquisition module collects DC current through the Hall effect chip U2. In actual use, there are many types of Hall effect chips U2 to choose from, such as UH7260, HAL270, or MLX91203. In this embodiment, the Hall effect chip U2 model is ACS712ELCTR-05B-T.

[0029] The DC current input pin of the Hall effect chip U2 is connected to the DC input terminal JP2. The voltage output pin of the Hall effect chip U2 outputs a signal to the data processing module via a voltage divider circuit. In this embodiment, the voltage divider circuit includes a first resistor R9 and a second resistor R10 connected in series. The common terminal of the first resistor R9 and the second resistor R10 serves as the output terminal of the DC current acquisition module and is connected to the input terminal of the data processing module.

[0030] Figure 3 The circuit diagram of the data processing module in the embodiment of the present utility model. The data processing module includes a processing chip U1, and the processing chip U1 includes a signal input terminal connected to the signal output terminal of the DC current acquisition module. The processing chip U1 also includes a signal transmission terminal connected to the signal input terminal of the communication module. The processing chip U1 performs AD processing on the DC current signal collected by the DC current acquisition module, and then sends it through the communication module. The AD processing function is a common data processing method of the chip, which can be implemented by those skilled in the art using existing technology and is not the protection content of this application.

[0031] The data processing module's processing chip can use any of a variety of existing processing chip models. In this embodiment, the processing chip U1 is model STM32F103C8T6. Pin 10 of the processing chip U1 serves as a signal input terminal, connected to the voltage output pin of the Hall effect chip U2. Pins 31 and 30 of the processing chip U1 serve as signal transmission terminals, connected to the communication module.

[0032] Figure 4 FIG. 1 is a circuit diagram of a communication module in an embodiment of the present utility model. Figure 4 As shown, the communication module remotely transmits the current acquisition signal to the monitoring terminal via the 485 chip U3. The data input terminal of the 485 chip U3 is connected to the signal transmission terminal of the processing chip U1, and the data transmission terminal of the 485 chip U3 remotely transmits the current acquisition signal to the monitoring terminal. This facilitates remote monitoring of current data. In the prior art, there are many types of 485 chips to choose from. In this embodiment, the 485 chip model is SP3485. Its second and third pins are data input terminals for connecting to the processing chip U1, and its sixth and seventh pins are data transmission terminals for sending data.

[0033] Figure 5This is a circuit diagram of the power protection module in an embodiment of the present utility model. The power protection module includes a transient voltage suppressor and a ceramic gas discharge tube connected in parallel between the input and output terminals of the power protection module. Specifically, the power protection module includes a first transient voltage suppressor TVS1, a second transient voltage suppressor TVS2, and a third transient voltage suppressor TVS3. The cathode of the first transient voltage suppressor TVS1 is connected to the voltage input terminal VCC of the power protection module, and the anode of the first transient voltage suppressor TVS1 is connected to the reference voltage terminal GND of the power protection module. The cathode of the second transient voltage suppressor TVS2 is connected to the voltage input terminal VCC of the power protection module, and the anode of the second transient voltage suppressor TVS2 is connected to the protective ground terminal PE. The cathode of the third transient voltage suppressor TVS3 is connected to the reference voltage terminal GND of the power protection module, and the anode of the third transient voltage suppressor TVS3 is connected to the protective ground terminal PE.

[0034] Furthermore, an inductor is connected in series between the connection line between the transient voltage suppressor (TVS1) and the ceramic gas discharge tube (GDT1). The two ends of the first inductor L1 are connected to the cathode of the first transient voltage suppressor (TVS1) and the third pin of the ceramic gas discharge tube (GDT1), respectively. The two ends of the second inductor L2 are connected to the anode of the first transient voltage suppressor (TVS1) and the first pin of the ceramic gas discharge tube (GDT1), respectively. The second pin of the ceramic gas discharge tube (GDT1) is connected to the reference voltage terminal GND.

[0035] like Figure 5 As shown, the power supply voltage is connected to the power protection module through the power input terminal P4, and passes through the transient voltage suppression tube and the ceramic gas discharge tube to protect the power supply from lightning. It is then output through the power output terminal P3 to be used as the power supply for the signal current module.

[0036] Furthermore, in order to provide a suitable low-voltage DC power supply for the signal current module, this embodiment also includes a power conversion module. Figure 6 This is a circuit diagram of the power conversion module in this embodiment of the utility model. The power conversion module includes voltage conversion chips V1 and V2, which convert the input power into low-voltage, stable 5V and 3.3V voltages, providing operating power for the DC current acquisition module, data processing module, and power protection module in the signal current module.

[0037] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. The present invention may be modified in any form without violating the basic structure of the present invention.

Claims

1. A DC system monitoring device with lightning protection function, characterized in that: include: The signal current module receives the input current, collects the current, and then sends the current collection signal, including: A DC current acquisition module, for acquiring the input current; a data processing module, receiving the output signal of the DC current acquisition module and performing data processing; A communication module receives and sends the current acquisition signal output by the data processing module; The power protection module receives an input voltage and outputs a voltage signal to the signal current module as an operating voltage of the signal current module after passing through a protection circuit.

2. The DC system monitoring device with lightning protection function according to claim 1, characterized in that: The DC current acquisition module acquires DC current through a Hall chip.

3. The DC system monitoring device with lightning protection function according to claim 2, characterized in that: The DC current input pin of the Hall chip is connected to the DC input terminal; the voltage output pin of the Hall chip outputs a signal to the data processing module through a voltage divider circuit.

4. The DC system monitoring device with lightning protection function according to claim 1, characterized in that: The data processing module includes a processing chip, which includes a signal input terminal connected to the signal output terminal of the DC current acquisition module; the processing chip also includes a signal transmission terminal connected to the signal input terminal of the communication module.

5. The DC system monitoring device with lightning protection function according to claim 4, characterized in that: The model of the processing chip of the data processing module is stm32f103c8t6.

6. The DC system monitoring device with lightning protection function according to claim 1, characterized in that: The communication module remotely sends the current acquisition signal to the monitoring terminal through the 485 chip.

7. The DC system monitoring device with lightning protection function according to claim 1, characterized in that: The power protection module includes a transient voltage suppression tube and a ceramic gas discharge tube connected in parallel between the input end and the output end of the power protection module.

8. The DC system monitoring device with lightning protection function according to claim 7, characterized in that: The power protection module includes a first transient voltage suppression tube, a second transient voltage suppression tube and a third transient voltage suppression tube; the cathode of the first transient voltage suppression tube is connected to the voltage input terminal of the power protection module, and the anode of the first transient voltage suppression tube is connected to the reference voltage terminal of the power protection module; the cathode of the second transient voltage suppression tube is connected to the voltage input terminal of the power protection module, and the anode of the second transient voltage suppression tube is connected to the protection ground terminal; the cathode of the third transient voltage suppression tube is connected to the reference voltage terminal of the power protection module, and the anode of the third transient voltage suppression tube is connected to the protection ground terminal.

9. The DC system monitoring device with lightning protection function according to claim 7, characterized in that: An inductor is connected in series between the connection line between the transient voltage suppressor and the ceramic gas discharge tube.

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