Shelter power supply security index detection device

Abstract

The utility model discloses a shelter power supply security index detection device. Comprising a shell, a panel on one side of the shell is provided with an alternating current input port and a test ground port, the test ground port is connected with the alternating current input port, a panel on the other opposite side is provided with an alternating current output port and a vehicle body ground port, the vehicle body ground port is connected with the alternating current output port, and a control panel is arranged in the shell. The control panel is provided with a control unit and a power relay, the control unit is connected with the power relay, the power relay is connected with the alternating current input port and the alternating current output port, and the control unit can control operation of the power relay so that the alternating current input port and the alternating current output port can be connected or disconnected. According to the invention, wiring and connection in the shelter are facilitated, and the installation and maintenance efficiency is improved. The power relay is controlled by the control unit, so that the connection or disconnection between the alternating current input port and the alternating current output port can be accurately realized. And the safety and the stability of the whole shelter power supply system are improved.

Description

Technical Field

[0001] This application relates to the field of container power supply testing technology, and in particular to a container power supply security indicator testing device. Background Technology

[0002] A mobile power supply unit (RFU) is a type of portable power station primarily used to provide power to various outdoor electrical equipment. RFUs feature modular design, rapid response, intelligent management, and environmental friendliness. They can be flexibly combined and configured according to actual needs, making them suitable for various locations and environments. Before using a RFU, it needs to be tested. This testing process requires consideration of various factors, such as the accuracy of parameters like voltage and current. These factors increase the difficulty and complexity of the testing, making the process inconvenient.

[0003] In practice, testing personnel need to use various specialized equipment to test the power supply of the cabin. However, these devices are often cumbersome to operate, have low testing efficiency, and cannot accurately control the power supply's conduction and disconnection, resulting in poor safety and stability of the cabin power supply during use. Utility Model Content

[0004] The main technical problem addressed by this application is to provide a device for detecting safety indicators of container power supply, which solves the problems of low efficiency in detecting container power supply and inability to accurately control the conduction and disconnection of container power supply, resulting in poor safety and stability of container power supply during use.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is to provide a container power supply security index detection device, including a housing. An AC input port and a test ground port are provided on one side panel of the housing, and the test ground port is connected to the AC input port. An AC output port and a vehicle ground port are provided on the opposite side panel, and the vehicle ground port is connected to the AC output port. A control board is provided inside the housing, and a control unit and a power relay are provided on the control board. The control unit is connected to the power relay, and the power relay is connected to the AC input port and the AC output port. The control unit can control the operation of the power relay to make the AC input port and the AC output port connected or disconnected.

[0006] In some embodiments, the second pin of the AC input port is connected to the second pin of the AC output port, the vehicle ground port is connected to the third pin of the AC output port, the vehicle ground port is connected to the third pin of the AC input port, and the vehicle ground port is connected to a grounding port.

[0007] In some embodiments, the control board is provided with a first connection port and a second connection port. The vehicle ground port is connected to the first connection port, the first connection port is connected to the test ground port, the second connection port is connected to a voltage regulator unit, the first connection port is connected to an amplifier unit, and the amplifier unit and the voltage regulator unit are connected to a control unit. The voltage regulator unit is used to provide power to the control unit, and the amplifier unit is used to amplify the signals at the test ground port and the vehicle ground port and transmit them to the control unit.

[0008] In some embodiments, the control board is further provided with a third connection port and a fourth connection port. The third connection port is connected to the second connection port, and the third connection port and the fourth connection port are connected to a leakage protection unit. The leakage protection unit is used to detect leakage abnormalities in the power supply of the cabin.

[0009] In some embodiments, the third connection port is connected to an electromagnetic relay. The third connection port is provided with four connection pins. The first connection pin of the third connection port is connected to a 12V power supply, the second connection pin of the third connection port is grounded, the third connection pin of the third connection port is connected to the output pin of the leakage current protection unit, and the fourth connection pin of the third connection port is connected to an electromagnetic relay.

[0010] In some embodiments, the control board is further provided with a fifth connection port and a sixth connection port. The power relay is connected to the fifth connection port, the AC input port is connected to the sixth connection port, and the sixth connection port is connected to a power conversion unit and the fifth connection port. The power conversion unit converts the AC input into 12V DC power.

[0011] In some embodiments, the control unit is connected to an indicator unit disposed on the front panel of the housing, the indicator unit being used to display the operating status of the cabin power supply.

[0012] In some embodiments, the control unit is connected to an alarm unit, which provides an audible alarm when the power supply status of the shelter is abnormal.

[0013] In some embodiments, the control unit is further connected to a bell-stopping unit, which is used to shut down the alarm unit to turn off the audible alarm.

[0014] In some embodiments, a magnetic ring is further provided between the vehicle ground port and the first connection port, and the connecting line between the vehicle ground port and the first connection port passes through the magnetic ring, and the connecting line between the test ground port and the first connection port also passes through the magnetic ring.

[0015] The beneficial effects of this application are as follows: One side panel is equipped with an AC input port and a test ground port, with the test ground port connected to the AC input port. The other side panel is equipped with an AC output port and a vehicle ground port, with the vehicle ground port connected to the AC output port. This distribution method makes the input and output structure of the device clear, facilitating wiring and connection within the shelter, and improving installation and maintenance efficiency. A control board is installed inside the housing, integrating a control unit and a power relay. The power relay is connected to both the AC input and AC output ports, and its operation is controlled by the control unit to achieve port switching. Through the control unit's control of the power relay, the switching between the AC input and AC output ports can be precisely achieved. During normal testing, the port can be controlled to be on, allowing normal power output; when an abnormality is detected, the port can be quickly disconnected, protecting the equipment within the shelter from power problems and improving the safety and stability of the entire shelter's power supply system. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a structure according to an embodiment of this application;

[0017] Figure 2 This is a circuit wiring diagram according to an embodiment of this application;

[0018] Figure 3 This is a circuit schematic diagram of a control unit according to an embodiment of this application;

[0019] Figure 4 This is a circuit schematic diagram of a voltage regulator unit according to an embodiment of this application;

[0020] Figure 5 This is a circuit schematic diagram of an amplification unit according to an embodiment of this application;

[0021] Figure 6 This is a circuit diagram of a leakage current protection unit according to an embodiment of this application;

[0022] Figure 7 This is a circuit schematic diagram of a power conversion unit according to an embodiment of this application;

[0023] Figure 8 This is a circuit schematic diagram of an indicator unit according to an embodiment of this application;

[0024] Figure 9 This is a circuit diagram of an alarm unit according to an embodiment of this application;

[0025] Figure 10 This is a circuit diagram of a bell-stopping unit according to an embodiment of this application. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0028] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0030] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0031] Figure 1 - Figure 10An embodiment of the safe power supply indicator testing device for the container of this application is shown, including a housing 1. An AC input port XS2 and a test ground port XB2 are provided on one side panel of the housing 1. The test ground port XB2 is connected to the AC input port XS2. An AC output port XS1 and a vehicle ground port XB1 are provided on the opposite side panel. The vehicle ground port XB1 is connected to the AC output port XS1. A control board (not shown in the figure) is provided inside the housing 1. The control board is provided with a control unit and a power relay K1. The control unit is connected to the power relay K1. The power relay K1 is connected to the AC input port XS2 and the AC output port XS1. The control unit can control the operation of the power relay K1 to make the AC input port XS2 and the AC output port XS1 connected or disconnected.

[0032] In this application, one side panel is equipped with an AC input port XS2 and a test ground port XB2, with the test ground port XB2 connected to the AC input port XS2. The other side panel is equipped with an AC output port XS1 and a vehicle ground port XB1, with the vehicle ground port XB1 connected to the AC output port XS1. This distribution makes the input and output structure of the device clear, facilitates wiring and connection within the shelter, and improves installation and maintenance efficiency. A control board is installed inside the housing 1, which integrates a control unit and a power relay K1. The power relay K1 is connected to both the AC input port XS2 and the AC output port XS1, and its operation is controlled by the control unit to achieve the connection or disconnection of the ports. By controlling the power relay K1 through the control unit, the connection or disconnection between the AC input port XS2 and the AC output port XS1 can be precisely achieved. During normal testing, the ports can be controlled to be on, allowing normal power output; when an abnormality is detected, the ports can be quickly disconnected to protect the equipment within the shelter from power problems, improving the safety and stability of the entire shelter power supply system.

[0033] During the testing process, if power parameters are found to exceed the safe range, the control unit can quickly issue a command to disconnect the circuit of power relay K1, promptly cutting off the power supply, protecting the equipment inside the shelter from damage, and ensuring the safety and stability of the entire shelter's power system. Power relay K1 is model T92P11A22, and it is connected to AC input port XS2, AC output port XS1, and the fifth connection port 5XP4. The first pin of AC output port XS1 is connected to the first pin of power relay K1, the first pin of AC output port XS1 is connected to the second pin of power relay K1, the first pin of AC input port XS2 is connected to the third pin of power relay K1, and the first pin of AC input port XS2 is connected to the fourth pin of power relay K1.

[0034] In some embodiments, such as Figure 2As shown, the second pin of the AC input port XS2 is connected to the second pin of the AC output port XS1, the vehicle ground port XB1 is connected to the third pin of the AC output port XS1, the vehicle ground port XB1 is connected to the third pin of the AC input port XS2, and the vehicle ground port XB1 is connected to the ground port ZXB3.

[0035] In some embodiments, such as Figure 2 As shown, a magnetic ring is also provided between the vehicle ground port XB1 and the first connection port 2XP1, and the connecting line between the vehicle ground port XB1 and the first connection port 2XP1 passes through the magnetic ring. The connecting line between the test ground port XB2 and the first connection port 2XP1 also passes through the magnetic ring. The magnetic ring can suppress high-frequency noise and improve signal purity.

[0036] In some embodiments, such as Figure 2 As shown, capacitors C1 and C2 are connected to the fourth connection port 5XP2, and capacitors C1 and C2 are connected to coil L1.

[0037] In some embodiments, such as Figure 2 - Figure 5 As shown, the control board has a first connection port 2XP1 and a second connection port 2XP2. The vehicle ground port XB1 is connected to the first connection port 2XP1, and the first connection port 2XP1 is connected to the test ground port XB2. A voltage regulator unit is connected to the second connection port 2XP2, and an amplifier unit is connected to the first connection port 2XP1. The amplifier unit and the voltage regulator unit are connected to the control unit. The voltage regulator unit provides a stable power supply to the control unit. The amplifier unit amplifies the signals from the test ground port XB2 and the vehicle ground port XB1 and transmits them to the control unit.

[0038] The voltage regulation unit includes voltage regulator 2D3, model number 78L05; the amplification unit includes amplifier, model number BLM258; and the control unit includes controller 2D2, model number PIC16C711.

[0039] like Figure 4 As shown, the input pin of voltage regulator 2D3 is also electrically connected to two parallel capacitors and then grounded. The output pin of voltage regulator 2D3 outputs 5V power, which can power controller 2D2. The output pin of voltage regulator 2D3 is also electrically connected to a resistor and two capacitors in parallel and then grounded.

[0040] like Figure 4As shown, the input pin of voltage regulator 2D3 is also connected to the second connection port 2XP2. The second connection port 2XP2 has four connection pins. The first connection pin is connected to the input terminal of voltage regulator 2D3. The second connection pin of voltage regulator 2D3 is grounded. The third connection pin of voltage regulator 2D3 is connected to the general-purpose pin RA2 of controller 2D2, through which the leakage current signal enters. The fourth connection pin of voltage regulator 2D3 is connected to the general-purpose pin RB4 of controller 2D2, through which the relay control signal enters. The third connection pin of voltage regulator 2D3 is also electrically connected to ground via a parallel resistor and capacitor. A resistor is also connected between the fourth connection pin of voltage regulator 2D3 and the general-purpose pin RB4 of controller 2D2.

[0041] like Figure 5 As shown, there are two amplifiers: a first amplifier 2D1B and a second amplifier 2D1A. The first amplifier 2D1B is connected to the general-purpose pin RA1 of the controller 2D2, and the second amplifier 2D1A is connected to the general-purpose pin RA0 of the controller 2D2.

[0042] like Figure 5 As shown, the positive input pin of the first amplifier 2D1B is connected to the vehicle ground port XB1 and the test ground port XB2. The negative input pin of the first amplifier 2D1B is connected to the first adjustable resistor and then grounded. The output pin of the first amplifier 2D1B is connected to a resistor, and then to a set of parallel resistors and capacitors before being connected to the general-purpose pin RA1 of the controller 2D2.

[0043] like Figure 5 As shown, the positive input pin of the second amplifier 2D1A is connected to the vehicle ground port XB1 and the test ground port XB2. The negative input pin of the second amplifier 2D1A is connected to the second adjustable resistor and then grounded. The output pin of the second amplifier 2D1A is connected to a resistor, then to a set of parallel resistors and capacitors, and then to the general-purpose pin RA0 of the controller 2D2. The negative power input terminal of the second amplifier 2D1A is grounded, and the positive power input terminal of the second amplifier 2D1A is connected to a 12V power supply.

[0044] like Figure 5 As shown, after an inductor is connected to the vehicle ground port XB1 and the test ground port XB2, two resistors are connected in series and then connected to the positive input pins of the first amplifier 2D1B and the second amplifier 2D1A. The positive input pins of the first amplifier 2D1B and the second amplifier 2D1A are also connected to a set of two capacitors and a resistor in parallel and then grounded, with the resistor located between the two capacitors.

[0045] like Figure 5As shown, the inductor connected to the vehicle ground port XB1 and the test ground port XB2 is connected in series with a diode and a resistor between them and the positive input pin of the second amplifier 2D1A. The output pin of the second amplifier 2D1A is connected to ground in sequence with a diode, a resistor, and a capacitor. The second adjustable resistor is connected to ground with a resistor and a capacitor.

[0046] In some embodiments, such as Figure 2 and Figure 6 As shown, the control board also has a third connection port 5XP3 and a fourth connection port 5XP2. The third connection port 5XP3 is connected to the second connection port 5XP2, and both the third connection port 5XP3 and the fourth connection port 5XP2 are connected to a leakage current protection unit. The leakage current protection unit is used to detect abnormal leakage in the cabin's power supply. If an abnormal leakage occurs, it will cut off the cabin's power supply in conjunction with a battery relay to prevent equipment damage and the risk of electric shock to personnel.

[0047] like Figure 6 As shown, the leakage current protection unit includes a leakage current protector 5D2, model number VG54123. The power supply pin of leakage current protector 5D2 is connected to a 12V power supply. The output pin of leakage current protector 5D2 is connected to the third connection port 5XP3. The input pin of leakage current protector 5D2 is connected to the fourth connection port 5XP2. The reference voltage pin of leakage current protector 5D2 is also connected to a capacitor and then grounded.

[0048] like Figure 6 As shown, the fourth connection port 5XP2 has two connection pins. A set of parallel capacitors and two diodes are connected between the two connection pins. After that, a resistor is connected to the input pin of the leakage current protector 5D2. The second connection pin of the fourth connection port 5XP2 is also connected to an adjustable resistor and then to the reference voltage pin of the leakage current protector 5D2. The adjustable resistor is also connected to a capacitor and then to the input pin of the leakage current protector 5D2.

[0049] like Figure 6 As shown, the third connection port 5XP3 is connected to an electromagnetic relay, model JQX-13FC-12V. The third connection port 5XP3 has four pins. The first pin is connected to a 12V power supply, the second pin is grounded, and the third pin is connected to the output pin of the residual current device (RCD2), which outputs the leakage current signal. The fourth pin of the third connection port 5XP3 is connected to the electromagnetic relay.

[0050] The fourth connection pin of the third connection port 5XP3 is connected to a set of parallel resistors and diodes to the electromagnetic relay. The parallel resistors and diodes are connected to an adjustable resistor, which is connected to the electromagnetic relay. The electromagnetic relay has a diode connected in parallel.

[0051] In some embodiments, such as Figure 2 and Figure 7 As shown, the control board also has a fifth connection port 5XP4 and a sixth connection port 5XP1. The power relay K1 is connected to the fifth connection port 5XP4, and the AC input port XS2 is connected to the sixth connection port 5XP1. The sixth connection port 5XP1 is connected to the power conversion unit and the fifth connection port 5XP4. The power conversion unit converts the AC input into 12V DC power to power the various units on the control board.

[0052] In some embodiments, such as Figure 7 As shown, the power conversion unit includes a power converter 5D1, model number FAS2.5-12-WED. Two input pins of power converter 5D1 are connected to the sixth connection port 5XP1. One output pin of power converter 5D1 is grounded, and the other output pin outputs 12V power. This 12V power can power the leakage current protector 5D2, electromagnetic relay, voltage regulator 2D3, amplifier, etc. Two capacitors are also connected in parallel between the two output pins of power converter 5D1. Power converter 5D1 provides a stable DC power supply, reducing the impact of voltage fluctuations on sensitive devices and improving system reliability.

[0053] In some embodiments, such as Figure 2 and Figure 7 As shown, the fifth connection port 5XP4 is used to output AC power, and the sixth connection port 5XP1 is used to input AC power. One pin of the fifth connection port 5XP4 and the sixth connection port 5XP1 is grounded, and an electromagnetic relay is installed on the connection line between the fifth connection port 5XP4 and the sixth connection port 5XP1.

[0054] In some embodiments, such as Figure 1 As shown, the control unit is connected to an indicator unit, which is located on the front panel of housing 1. The indicator unit visually displays the power status and displays a red indicator to trigger an alarm in case of an abnormality, improving operational convenience and safety.

[0055] In some embodiments, such as Figure 1 and Figure 8As shown, the indicator unit displays the power supply's operating status. The indicator unit includes a working indicator light 2V9, a leakage current indicator light 2V8, a leakage voltage indicator light 2V7, and a grounding indicator light 2V6. The working indicator light 2V9 is connected to the general-purpose pin RB3 of the controller 2D2; the leakage current indicator light 2V8 is connected to the general-purpose pin RB2 of the controller 2D2; the leakage voltage indicator light 2V7 is connected to the general-purpose pin RB1 of the controller 2D2; and the grounding indicator light 2V6 is connected to the general-purpose connection port RB0 of the controller 2D2. When both leakage voltage and leakage current meet the requirements, the control relay is activated, sending a signal to the AC output port XS1. When a leakage voltage or leakage current fault occurs, the relay is deactivated, cutting off the AC output and triggering an audible and visual alarm. When grounding is faulty, an audible and visual alarm is triggered, but no protective action is taken.

[0056] In some embodiments, such as Figure 9 As shown, the control unit is connected to an alarm unit, which provides an audible alarm when the power supply is abnormal, improving operational convenience and safety. The alarm unit includes a buzzer 2H1, which is connected to the general-purpose pin RB5 of the controller 2D2. A resistor, a transistor, and a diode are connected between the buzzer 2H1 and the general-purpose pin RB5 of the controller 2D2.

[0057] In some embodiments, such as Figure 1 and Figure 10 As shown, the control unit is also connected to a ring-stop unit, which can shut down the alarm unit to silence the audible alarm. This allows for manual intervention of the alarm function, reducing false alarm interference. The ring-stop unit includes a ring-stop button 2S1, which is connected to the general-purpose pin RA2 of the controller 2D2. The ring-stop button 2S1 eliminates the grounding alarm sound but does not affect the next alarm sound. A resistor is connected between the ring-stop button 2S1 and the general-purpose pin RA2 of the controller 2D2. This resistor is connected to a capacitor and then to ground, and finally to a 5V power supply via another resistor.

[0058] This application, in use, can connect to one 220V AC input and output another 220V AC input, detecting AC leakage and poor grounding, providing audible and visual alarms and corresponding protection. It offers corresponding audible and visual indications for various basic fault conditions. When the 220V AC voltage is connected to the AC input port interface, the green indicator light will illuminate.

[0059] a. If no abnormality occurs, output AC 220V voltage to the AC output port interface.

[0060] b. When the loop resistance between the vehicle ground port and the test ground port is greater than 50 μV ± 5 μV, it is considered a grounding failure. The grounding indicator red light will illuminate, the buzzer will sound an alarm simultaneously, no protective action will be taken, and AC 220V voltage will be output to the AC output port interface. At this time, the alarm sound can be silenced using the silence button.

[0061] c. If the AC voltage between the vehicle ground port and the test ground port is greater than 36V±4V, it is considered a leakage current. The leakage voltage indicator light will illuminate red, the buzzer will sound an alarm simultaneously, and the AC output circuit will be cut off. At this time, the stop ring button will be ineffective.

[0062] d. When the leakage current exceeds 25mA ± 5mA, it is considered a leakage current. At this time, the buzzer sounds an alarm (silencing is ineffective), the leakage current indicator light illuminates red, and the AC output circuit is cut off. AC 220V voltage is input through the AC input port, the leakage current is sampled by the leakage current sensor, and the AC voltage and loop resistance between the test ground port and the vehicle ground port are sampled by the controller.

[0063] Familiarity with the meanings of audible and visual indicators can facilitate troubleshooting. From an audible perspective, a 0.5-second alarm indicates AC input, while a continuous beep indicates leakage or poor grounding. As for the visual indicators, as shown in Table 1, the green light indicating operation is a two-state indicator: lit indicates normal AC input, and off indicates no input (or very low voltage). The red light indicating grounding or leakage is also a two-state indicator: lit indicates poor grounding or leakage, and off indicates normal operation.

[0064] Table 1 Indicator Light Status Indication

[0065]

[0066] Therefore, this application discloses a safety indicator testing device for a mobile cabin power supply. In this application, one side panel is equipped with an AC input port and a test ground port, with the test ground port connected to the AC input port. The other side panel is equipped with an AC output port and a vehicle ground port, with the vehicle ground port connected to the AC output port. This distribution makes the input and output structure of the device clear, facilitating wiring and connection within the mobile cabin and improving installation and maintenance efficiency. A control board is installed inside the housing, integrating a control unit and a power relay. The power relay is connected to both the AC input and AC output ports, and its operation is controlled by the control unit to achieve port switching. Through the control unit's control of the power relay, the switching between the AC input and AC output ports can be precisely achieved. During normal testing, the port can be controlled to be on, allowing normal power output; when an abnormality is detected, the port can be quickly disconnected, protecting the equipment within the mobile cabin from power problems and improving the safety and stability of the entire mobile cabin power supply system.

[0067] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A device for detecting safety indicators of power supply in a mobile shelter, characterized in that, The device includes a housing. One side panel of the housing has an AC input port and a test ground port, the test ground port being connected to the AC input port. The opposite side panel has an AC output port and a vehicle ground port, the vehicle ground port being connected to the AC output port. Inside the housing is a control board, which includes a control unit and a power relay. The control unit is connected to the power relay, which in turn connects the AC input port and the AC output port. The control unit can control the operation of the power relay to connect or disconnect the AC input port and the AC output port.

2. The container power supply security indicator detection device according to claim 1, characterized in that, The second pin of the AC input port is connected to the second pin of the AC output port, the vehicle ground port is connected to the third pin of the AC output port, the vehicle ground port is connected to the third pin of the AC input port, and the vehicle ground port is connected to a grounding port.

3. The container power supply security indicator detection device according to claim 1, characterized in that, The control board is provided with a first connection port and a second connection port. The vehicle ground port is connected to the first connection port, the first connection port is connected to the test ground port, the second connection port is connected to a voltage regulator unit, the first connection port is connected to an amplifier unit, and the amplifier unit and the voltage regulator unit are connected to a control unit. The voltage regulator unit is used to provide power to the control unit, and the amplifier unit is used to amplify the signals at the test ground port and the vehicle ground port and transmit them to the control unit.

4. The container power supply security indicator detection device according to claim 3, characterized in that, The control board is also provided with a third connection port and a fourth connection port. The third connection port is connected to the second connection port. The third connection port and the fourth connection port are connected to a leakage protection unit, which is used to detect leakage abnormalities in the power supply of the cabin.

5. The container power supply security indicator detection device according to claim 4, characterized in that, The third connection port is connected to an electromagnetic relay. The third connection port has four connection pins. The first connection pin of the third connection port is connected to a 12V power supply. The second connection pin of the third connection port is grounded. The third connection pin of the third connection port is connected to the output pin of the leakage protection unit. The fourth connection pin of the third connection port is connected to an electromagnetic relay.

6. The container power supply security indicator detection device according to claim 5, characterized in that, The control board is also provided with a fifth connection port and a sixth connection port. The power relay is connected to the fifth connection port, the AC input port is connected to the sixth connection port, and the sixth connection port is connected to the power conversion unit and the fifth connection port. The power conversion unit converts the AC input into 12V DC power.

7. The container power supply security indicator detection device according to claim 1, characterized in that, The control unit is connected to an indicator unit, which is located on the front panel of the housing and is used to display the working status of the container power supply.

8. The container power supply security indicator detection device according to claim 1, characterized in that, The control unit is connected to an alarm unit, which sounds an alarm when the power supply of the shelter is abnormal.

9. The container power supply security indicator detection device according to claim 8, characterized in that, The control unit is also connected to a bell-stopping unit, which is used to shut down the alarm unit to turn off the audible alarm.

10. The container power supply security indicator detection device according to claim 3, characterized in that, A magnetic ring is also provided between the vehicle ground port and the first connection port. The connecting line between the vehicle ground port and the first connection port passes through the magnetic ring, and the connecting line between the test ground port and the first connection port also passes through the magnetic ring.

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