Electromagnetic radiation detection equipment in power distribution cabinet

Abstract

The utility model relates to electromagnetic radiation detection equipment in a power distribution cabinet, which comprises a detection metal sheet arranged in a cabinet body, the detection metal sheet is connected with an acquisition circuit, the acquisition circuit comprises an amplifier, a switch module and an AD conversion module, the detection metal sheet is connected with the amplifier through a lead, and the output end of the amplifier is connected with the switch module. The other side of the switch module is connected with the input end of an AD conversion module, and the AD conversion module is in communication connection with an MCU chip. The output end of the MCU chip is connected with the control end of the switch module, and the MCU chip is further in communication connection with a display screen. The MCU chip, the display screen, the acquisition circuit and the power supply module are provided with a shell; and the shell is arranged outside the cabinet body. The detection metal sheet accumulates in a high-intensity magnetic field to generate inductive charges, voltage signal acquisition is performed on a loop where the detection metal sheet is located, and the electromagnetic radiation intensity is detected according to a forward proportional relation between voltage value change and electromagnetic field intensity.

Description

Technical Field

[0001] This utility model relates to the field of power distribution cabinet testing technology, specifically to an electromagnetic radiation detection device inside a power distribution cabinet. Background Technology

[0002] Electromagnetic interference (EMI) within a distribution cabinet refers to electromagnetic waves generated by electrical equipment during operation, which may interfere with the normal operation of other equipment inside or outside the distribution cabinet. EMI can not only cause equipment malfunctions but also affect the stability of the entire power distribution system. Electromagnetic radiation may also have certain effects on the human body. Long-term exposure to high-intensity electromagnetic radiation may cause headaches, insomnia, memory loss, and other problems, particularly posing potential risks to the nervous, cardiovascular, immune, endocrine, and reproductive systems.

[0003] Therefore, there is an urgent need for a detection device that can be installed inside a cabinet for long-term electromagnetic radiation detection. Summary of the Invention

[0004] This invention addresses the problem of electromagnetic radiation detection inside power distribution cabinets by proposing an electromagnetic radiation detection device. A detection metal plate is placed inside the cabinet to collect electromagnetic radiation. The detection metal plate accumulates induced charges in a strong magnetic field, and voltage signals are collected from the circuit containing the detection metal plate. The intensity of electromagnetic radiation is detected based on the positive proportionality between voltage changes and electromagnetic field strength.

[0005] To achieve the above objectives, this utility model proposes an electromagnetic radiation detection device for a power distribution cabinet, including a cabinet, a detection metal plate disposed inside the cabinet, the detection metal plate being connected to a data acquisition circuit, the data acquisition circuit including an amplifier, a switching module and an AD conversion module, the detection metal plate being connected to the amplifier via a wire, the output end of the amplifier being connected to the switching module, the other side of the switching module being connected to the input end of the AD conversion module, and the AD conversion module being communicatively connected to an MCU chip;

[0006] The output terminal of the MCU chip is connected to the control terminal of the switch module, and the MCU chip is also communicatively connected to the display screen.

[0007] The MCU chip, display screen, and data acquisition circuit are connected to a power module;

[0008] The MCU chip, display screen, acquisition circuit and power module are housed in a housing, which is located outside the cabinet.

[0009] Furthermore, the amplifier includes a μA741 amplifier, the non-inverting terminal of the μA741 amplifier is connected to the detection metal plate, the inverting terminal of the μA741 amplifier is grounded, and the output terminal of the μA741 amplifier is connected to the switching module.

[0010] The μA741 amplifier is a linear operational amplifier used for analog signal processing. It is simple to design and easy to use, featuring excellent gain characteristics, a wide voltage range, low noise, high input impedance, and low output impedance. The μA741 amplifier is used to amplify the output voltage signal from the detected metal plate.

[0011] Furthermore, the switching module includes a CD4066 chip, which includes a first analog switch and a second analog switch. One side of the first analog switch is connected to the output terminal of the μA741 amplifier, and the other side is connected to the AD conversion module. The control terminal of the first analog switch is connected to the output terminal of the MCU chip.

[0012] The CD4066 chip features low power consumption, high isolation, and bidirectional switching, and its circuit structure is simple and easy to control.

[0013] Furthermore, one side of the second analog switch is connected to the detection metal plate via a wire, and the control terminal of the second analog switch is connected to the output terminal of the MCU chip.

[0014] The circuit containing the first analog switch and the detection metal plate together form an electromagnetic radiation detection circuit.

[0015] To improve detection accuracy, a discharge circuit is formed by the second analog switch and the detection metal plate. Before detection, the charge on the detection metal plate is released to eliminate the residual influence of the previous magnetic field.

[0016] Furthermore, the detection metal sheet is a sheet-like structure made of conductive metal. The detection metal sheet has a simple structure, uses common materials, has low equipment manufacturing costs, and is easy to use and promote.

[0017] Furthermore, the AD conversion module includes an ADS8685 chip, which communicates with the MCU chip via an SPI serial port.

[0018] The MCU chip communicates with the display screen via a UART serial port.

[0019] The ADS8685 chip is a high-precision analog-to-digital converter that provides high-speed, high-precision signal conversion.

[0020] The beneficial effects of this utility model through the above technical solution are as follows:

[0021] This invention enables real-time detection of electromagnetic radiation intensity within a power distribution cabinet. A detection metal plate is installed inside the cabinet. In a strong magnetic field, the metal plate accumulates a non-induced charge. A data acquisition circuit is installed. This induced charge, after being connected to the acquisition circuit, forms an electromotive force and voltage difference in the conductive circuit. The strength of the induced voltage on the metal plate per unit time is directly proportional to the magnetic field strength in that environment. The acquisition circuit is connected to an MCU chip, which processes the detection data to obtain the electromagnetic radiation intensity. The MCU chip is connected to a display screen, which displays the detection parameters.

[0022] The acquisition circuit of this utility model includes an amplifier, a switching module, and an AD conversion module. The amplifier amplifies the acquired signal, and the MCU chip controls the opening and closing of the switching module to complete the continuity of the circuit where the metal sheet is located. Combined with the AD conversion module, the AD signal is converted. It has high detection accuracy, simple control, and is easy to set. Attached Figure Description

[0023] Figure 1 This is a circuit diagram of an electromagnetic radiation detection device for a power distribution cabinet according to the present invention.

[0024] The reference numerals are as follows: 1 is the metal detection plate, 2 is the amplifier, 3 is the switch module, 4 is the AD conversion module, 5 is the MCU chip, and 6 is the display screen. Detailed Implementation

[0025] Example 1

[0026] like Figure 1 As shown, an electromagnetic radiation detection device for a power distribution cabinet includes a cabinet, a detection metal plate 1 is installed inside the cabinet, the detection metal plate 1 is connected to a data acquisition circuit, the data acquisition circuit includes an amplifier 2, a switching module 3 and an AD conversion module 4, the detection metal plate 1 is connected to the amplifier 2 through a wire, the output end of the amplifier 2 is connected to the switching module 3, the other side of the switching module 3 is connected to the input end of the AD conversion module 4, and the AD conversion module 4 is communicatively connected to an MCU chip 5;

[0027] The output terminal of the MCU chip 5 is connected to the control terminal of the switch module 3, and the MCU chip 5 is also communicatively connected to the display screen 6.

[0028] The MCU chip 5, display screen 6, and data acquisition circuit are connected to a power module;

[0029] The MCU chip 5, display screen 6, acquisition circuit and power module are housed in a casing, which is located outside the cabinet.

[0030] In this embodiment, MCU chip 5 is an STM32f103 microcontroller, and display screen 6 is an LED display screen.

[0031] The amplifier 2 includes a μA741 amplifier. The non-inverting terminal of the μA741 amplifier is connected to the detection metal plate 1, the inverting terminal of the μA741 amplifier is grounded, and the output terminal of the μA741 amplifier is connected to the switching module 3.

[0032] The switching module 3 includes a CD4066 chip, which includes a first analog switch and a second analog switch. One side of the first analog switch is connected to the output terminal of the μA741 amplifier, and the other side is connected to the AD conversion module 4. The control terminal of the first analog switch is connected to the output terminal of the MCU chip 5.

[0033] One side of the second analog switch is connected to the detection metal piece 1 via a wire, and the control terminal of the second analog switch is connected to the output terminal of the MCU chip 5.

[0034] The detection metal sheet 1 is a sheet-like structure made of conductive metal.

[0035] The AD conversion module 4 includes an ADS8685 chip, and the ADS8685 chip communicates with the MCU chip 5 via an SPI serial port.

[0036] The MCU chip 5 communicates with the display screen 6 via a UART serial port.

[0037] like Figure 1 As shown, the B9 pin of the STM32f103 microcontroller is connected to analog switch 3 (second analog switch) of the CD4066 chip, and the A1 pin of the STM32f103 microcontroller is connected to analog switch 4 (first analog switch) of the CD4066 chip.

[0038] The detection metal plate 1 is installed inside the distribution cabinet, close to the component with the highest electromagnetic radiation. The wires of the detection metal plate 1 are shielded and extend out of the distribution cabinet to connect to the acquisition circuit located outside the distribution cabinet. The acquisition circuit is housed within a casing, which is fixed to the exterior wall. The MCU chip 5 also has buttons for human-machine interaction. These buttons are connected to the input terminals of the MCU chip 5 and are located outside the casing. The number of buttons includes at least a stop button and a start button.

[0039] During the initial test, to eliminate the residual effects of the previous magnetic field, the charge on the detection metal plate is first released. Pressing the operation button activates a high-level signal on pin B9 of MCU chip 5, opening the second analog switch and shorting detection metal plate 1 to ground. The grounding time is 1 second. After 1 second, MCU chip 5 resets the second analog switch, and detection metal plate 1 begins to accumulate charge in the strong magnetic field environment.

[0040] After the second analog switch is reset, the MCU chip 5 controls the first analog switch to open, detects the accumulation of charge on the metal plate 1 in a strong magnetic field environment to form a voltage difference, and the μA741 amplifier will amplify the continuously changing voltage signal by 10 times (adjusting the amplification factor according to the magnetic field strength) through gain adjustment. The first analog switch of the CD4066 chip is sent to the input terminal of the ADS8685 chip.

[0041] Since voltage changes are directly proportional to electromagnetic field strength, the electromagnetic field strength value is calculated proportionally and displayed in real time on the display screen 6 by the MCU chip 5. An electromagnetic radiation intensity threshold is set; if the detected value exceeds the threshold, it indicates that the electromagnetic radiation inside the distribution cabinet exceeds the standard.

[0042] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. An electromagnetic radiation detection apparatus for use in an electrical switchgear cabinet, comprising a cabinet body, characterised in that, The cabinet body is provided with a detection metal sheet (1), the detection metal sheet (1) is connected with a collection circuit, the collection circuit comprises an amplifier (2), a switch module (3) and an AD conversion module (4), the detection metal sheet (1) is connected with the amplifier (2) through a wire, the output end of the amplifier (2) is connected with the switch module (3), the other side of the switch module (3) is connected with the input end of the AD conversion module (4), and the AD conversion module (4) is connected with an MCU chip (5) in communication; The output end of the MCU chip (5) is connected with the control end of the switch module (3), and the MCU chip (5) is further connected with a display screen (6) in communication; The MCU chip (5), the display screen (6) and the collection circuit are connected with a power module; The MCU chip (5), the display screen (6), the collection circuit and the power module are provided with a shell, and the shell is arranged outside the cabinet body.

2. The electromagnetic radiation detection device in an electrical switchgear cabinet according to claim 1, characterized in that, The amplifier (2) comprises a μA741 amplifier, the same direction end of the μA741 amplifier is connected with the detection metal sheet (1), the reverse end of the μA741 amplifier is grounded, and the output end of the μA741 amplifier is connected with the switch module (3).

3. The electromagnetic radiation detection device in an electrical switchgear cabinet according to claim 2, characterized in that, The switch module (3) comprises a CD4066 chip, the CD4066 chip comprises a first analog switch and a second analog switch, one side of the first analog switch is connected with the output end of the μA741 amplifier, the other side of the first analog switch is connected with the AD conversion module (4), and the control end of the first analog switch is connected with the output end of the MCU chip (5).

4. The electromagnetic radiation detection device in an electrical switchgear cabinet according to claim 3, characterized in that, One side of the second analog switch is connected with the detection metal sheet (1) through a wire, and the control end of the second analog switch is connected with the output end of the MCU chip (5).

5. The power distribution cabinet electromagnetic radiation detection device of claim 1, wherein, The detection metal sheet (1) is a sheet-shaped structure made of conductive metal.

6. The power distribution cabinet electromagnetic radiation detection device of claim 1, wherein, The AD conversion module (4) comprises an ADS8685 chip, and the ADS8685 chip and the MCU chip (5) are connected in communication through an SPI serial port; The MCU chip (5) and the display screen (6) are connected in communication through a UART serial port.

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