Mobile communication outdoor multi-connection cabinet

Abstract

The utility model discloses a kind of mobile communication outdoor multi-connection cabinet, belong to communication cabinet technical field, solve the early failure of UPS battery individual unit in outdoor communication cabinet use, and BMS alarm threshold is loose and not sensitive and difficult to detect single deterioration, cause battery pack monitoring voltage normal but backup capacity greatly reduced;Power failure is difficult to supply power according to design, resulting in network node power failure, lack of data after accident difficult to locate reason, and fault risk still lurks problem. Including communication cabinet body, and battery dynamic internal resistance monitoring alarm circuit. When the utility model works, periodic trigger load pulse control module by time sequence control module, drive constant load and switch module to apply short constant current load to battery, and the voltage variation of battery under load is synchronously collected by signal sampling and processing module, finally by threshold comparison and alarm output module compare the variation with preset threshold, when exceeding threshold, output locking alarm signal.

Description

Technical Field

[0001] This utility model relates to the field of communication cabinet technology, and in particular to a mobile communication outdoor multi-unit cabinet. Background Technology

[0002] Outdoor communication cabinets are specialized equipment supporting outdoor communication networks. They are protected against wind, rain, dust, and corrosion, and can withstand complex outdoor environments such as high temperatures, low temperatures, and humidity. Internally, they contain equipment mounting racks, power systems (such as UPS backup batteries), and temperature control devices to maintain suitable internal temperature and humidity, ensuring stable operation of communication equipment. They are primarily used to house base station equipment and transmission equipment, supporting uninterrupted outdoor communication links and serving as critical infrastructure for outdoor communication network deployments.

[0003] In the use of outdoor communication cabinets, due to the early failure of some units in the built-in UPS backup battery pack, and the loose and insensitive alarm threshold of the battery management system (BMS), the individual cell deterioration cannot be detected in time. As a result, although the total floating voltage of the battery pack is monitored normally, the actual backup capacity drops significantly. When the mains power is interrupted unexpectedly, the battery pack cannot supply power according to the design time, causing the network node to lose power. After the accident, it is difficult to locate the root cause due to the lack of detailed data of individual batteries, and the risk of failure still lies dormant.

[0004] Therefore, a mobile communication outdoor multi-unit cabinet is proposed to solve or alleviate the above problems. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a mobile communication outdoor multi-unit cabinet.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An outdoor multi-unit mobile communication cabinet includes a communication cabinet body and a battery dynamic internal resistance monitoring and alarm circuit. The battery dynamic internal resistance monitoring and alarm circuit is electrically connected to the battery in the communication cabinet body. The battery dynamic internal resistance monitoring and alarm circuit applies a short-term standard current load to the battery periodically and simultaneously samples its terminal voltage change, compares the change value with a preset threshold, and issues a continuous and stable alarm signal when the limit is exceeded.

[0007] Preferably, the battery dynamic internal resistance monitoring and alarm circuit includes a timing control module, a load pulse control module, a constant load and switching module, a signal sampling and processing module, and a threshold comparison and alarm output module. The timing control module provides periodic trigger signals to the load pulse control module, and its output is connected to the trigger input of the load pulse control module. The load pulse control module sends load on / off control signals to the constant load and switching module, and its positive pulse output is connected to the control terminal of the constant load and switching module. The positive pulse output terminal is connected to the analog switch control terminal of the signal sampling and processing module through a delay circuit. The load current output terminal of the constant load and switch module is connected to the positive terminal of the battery in the communication cabinet body. The voltage differential sampling terminal of the signal sampling and processing module is connected to the positive terminal of the battery in the communication cabinet body. The signal voltage output terminal of the signal sampling and processing module is connected to the signal voltage input terminal of the threshold comparison and alarm output module. The threshold voltage setting terminal of the threshold comparison and alarm output module is used to connect to an adjustable reference potential. The signal output terminal of the threshold comparison and alarm output module outputs an alarm signal.

[0008] Preferably, the timing control module includes an NE555 timer chip, a first resistor, a second resistor, and a first capacitor. The reset terminal and power supply terminal of the NE555 timer chip are energized, the ground terminal of the NE555 timer chip is grounded, the discharge terminal of the NE555 timer chip is connected to one end of the first resistor, the other end of the first resistor is energized, the discharge terminal of the NE555 timer chip is connected to one end of the second resistor, the other end of the second resistor, the trigger terminal of the NE555 timer chip, and the threshold terminal of the NE555 timer chip are all connected to one end of the first capacitor, the other end of the first capacitor is grounded, and the output terminal of the NE555 timer chip is set as the output terminal of the timing control module.

[0009] Preferably, the load pulse control module includes a CD4047 monostable multivibrator chip, a third resistor, and a second capacitor. The power supply terminal of the CD4047 monostable multivibrator chip is connected to power, the ground terminal of the CD4047 monostable multivibrator chip is grounded, the positive trigger terminal of the CD4047 monostable multivibrator chip is connected to the output terminal of the timing control module, the asynchronous reset terminal of the CD4047 monostable multivibrator chip is connected to power, the asynchronous set terminal of the CD4047 monostable multivibrator chip is grounded, the common terminal of the external resistor and capacitor of the CD4047 monostable multivibrator chip is connected to one end of the third resistor and one end of the second capacitor, the other end of the third resistor is connected to the external resistor terminal of the CD4047 monostable multivibrator chip, the external capacitor terminal of the CD4047 monostable multivibrator chip and the external resistor terminal are connected to the other end of the second capacitor, and the positive pulse output terminal of the CD4047 monostable multivibrator chip is set as the positive pulse output terminal of the load pulse control module.

[0010] Preferably, the constant load and switching module includes a TL431 reference source, a first LM358 operational amplifier, a first power MOSFET, a second power MOSFET, a fourth resistor, a fifth resistor, and a current sensing resistor. The reference and cathode of the TL431 reference source are shorted and connected to the non-inverting input of the first LM358 operational amplifier and one end of the fourth resistor. The other end of the fourth resistor is energized. The anode of the TL431 reference source is grounded. The output of the first LM358 operational amplifier is connected to the gate of the second power MOSFET, and the inverting input of the first LM358 operational amplifier is connected to the second power MOSFET. The source of the MOSFET and one end of the current sensing resistor are connected. The positive power supply terminal of the first LM358 operational amplifier is connected to the power supply, and the negative power supply terminal of the first LM358 operational amplifier is grounded. The gate of the first power MOSFET is connected to the positive pulse output terminal of the load pulse control module through the fifth resistor. The drain of the first power MOSFET is connected to the drain of the second power MOSFET. The source of the first power MOSFET is connected to the positive terminal of the battery in the communication cabinet. The source of the second power MOSFET is connected to the inverting input terminal of the first LM358 operational amplifier and one end of the current sensing resistor. The other end of the current sensing resistor is grounded.

[0011] Preferably, the signal sampling and processing module includes a second LM358 operational amplifier, a CD4066 quad bidirectional analog switch chip, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a holding capacitor, and a potentiometer. The non-inverting input of the second LM358 operational amplifier is connected to the positive terminal of the battery in the communication cabinet through the sixth resistor. The inverting input of the second LM358 operational amplifier is connected to the positive terminal of the battery in the communication cabinet through the seventh resistor. The inverting input of the second LM358 operational amplifier is connected to its output terminal through the eighth resistor. The inverting input of the second LM358 operational amplifier is connected to the sliding terminal of the potentiometer through the ninth resistor. The first fixed terminal of the potentiometer is energized, and the second fixed terminal of the potentiometer is grounded. The output terminal of the second LM358 operational amplifier is connected to the input terminal of the first switch of the CD4066 quad bidirectional analog switch chip. The control terminal of the first switch of the CD4066 quad bidirectional analog switch chip is set as the analog switch control terminal. The output terminal of the first switch of the CD4066 quad bidirectional analog switch chip is connected to one end of the holding capacitor. The other end of the holding capacitor is set as the signal voltage output terminal of the signal sampling and processing module.

[0012] Preferably, the threshold comparison and alarm output module includes an LM393 dual voltage comparator, a CD4043 quad NOR gate RS latch chip, an optocoupler, a tenth resistor, an eleventh resistor, and an adjustable potentiometer. The non-inverting input of the first comparator in the LM393 dual voltage comparator is set as the signal voltage input. The non-inverting input of the first comparator in the LM393 dual voltage comparator is connected to the signal voltage output of the signal sampling and processing module. The inverting input of the first comparator in the LM393 dual voltage comparator is connected to the sliding contact of the adjustable potentiometer. The output of the first comparator in the voltage comparator is connected to power through the tenth resistor. The output of the first comparator in the LM393 dual voltage comparator is connected to the set terminal of the first latch of the CD4043 quad NOR gate RS latch chip. The output of the first latch of the CD4043 quad NOR gate RS latch chip is connected to the anode of the light-emitting diode in the optocoupler through the eleventh resistor. The cathode of the light-emitting diode in the optocoupler is grounded. The collector and emitter of the phototransistor in the optocoupler are set as alarm signal output terminals. The two fixed terminals of the adjustable potentiometer are connected to power and ground respectively.

[0013] This utility model has the following beneficial effects: When this utility model is working, the timing control module periodically triggers the load pulse control module, which drives the constant load and switching module to apply a short-term constant current load to the battery. The signal sampling and processing module synchronously collects the change in battery voltage under the load. Finally, the threshold comparison and alarm output module compares the change with a preset threshold, and outputs a lock alarm signal when the threshold is exceeded. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural block diagram of the battery dynamic internal resistance monitoring and alarm circuit in this utility model.

[0016] In the diagram: 1. Communication cabinet body; 2. Timing control module; 3. Load pulse control module; 4. Constant load and switching module; 5. Signal sampling and processing module; 6. Threshold comparison and alarm output module. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to 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 utility model.

[0021] Furthermore, the terms "first," "second," and "third" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] A mobile communication outdoor multi-unit cabinet, such as Figure 1 As shown, the device includes a communication cabinet body 1 and a battery dynamic internal resistance monitoring and alarm circuit. The battery dynamic internal resistance monitoring and alarm circuit is electrically connected to the battery in the communication cabinet body 1. The battery dynamic internal resistance monitoring and alarm circuit applies a short standard current load to the battery periodically and simultaneously samples its terminal voltage change, compares the change value with a preset threshold, and issues a continuous and stable alarm signal when the limit is exceeded.

[0024] like Figure 2As shown, the battery dynamic internal resistance monitoring and alarm circuit includes a timing control module 2, a load pulse control module 3, a constant load and switching module 4, a signal sampling and processing module 5, and a threshold comparison and alarm output module 6. The timing control module 2 provides periodic trigger signals to the load pulse control module 3. The output terminal of the timing control module 2 is connected to the trigger input terminal of the load pulse control module 3. The load pulse control module 3 sends load on / off control signals to the constant load and switching module 4. The positive pulse output terminal of the load pulse control module 3 is connected to the control terminal of the constant load and switching module 4. The positive pulse output terminal is connected to the analog switch control terminal of the signal sampling and processing module 5 through a delay circuit. The load current output terminal of the constant load and switch module 4 is connected to the positive terminal of the battery in the communication cabinet body 1. The voltage differential sampling terminal of the signal sampling and processing module 5 is connected to the positive terminal of the battery in the communication cabinet body 1. The signal voltage output terminal of the signal sampling and processing module 5 is connected to the signal voltage input terminal of the threshold comparison and alarm output module 6. The threshold voltage setting terminal of the threshold comparison and alarm output module 6 is used to connect to the adjustable reference potential. The signal output terminal of the threshold comparison and alarm output module 6 outputs an alarm signal.

[0025] The timing control module 2 includes an NE555 timer chip, a first resistor, a second resistor, and a first capacitor. The reset and power terminals of the NE555 timer chip are energized, the ground terminal of the NE555 timer chip is grounded, the discharge terminal of the NE555 timer chip is connected to one end of the first resistor, the other end of the first resistor is energized, the discharge terminal of the NE555 timer chip is connected to one end of the second resistor, the other end of the second resistor, the trigger terminal of the NE555 timer chip, and the threshold terminal of the NE555 timer chip are all connected to one end of the first capacitor, the other end of the first capacitor is grounded, and the output terminal of the NE555 timer chip is set as the output terminal of the timing control module 2.

[0026] The load pulse control module 3 includes a CD4047 monostable multivibrator chip, a third resistor, and a second capacitor. The power supply terminal of the CD4047 monostable multivibrator chip is connected to power, the ground terminal of the CD4047 monostable multivibrator chip is grounded, the positive trigger terminal of the CD4047 monostable multivibrator chip is connected to the output terminal of the timing control module 2, the asynchronous reset terminal of the CD4047 monostable multivibrator chip is connected to power, and the asynchronous set terminal of the CD4047 monostable multivibrator chip is grounded. The common terminal of the external resistor and capacitor of the CD4047 monostable multivibrator chip is connected to one end of the third resistor and one end of the second capacitor. The other end of the third resistor is connected to the external resistor terminal of the CD4047 monostable multivibrator chip. The external capacitor terminal and the external resistor terminal of the CD4047 monostable multivibrator chip are connected to the other end of the second capacitor. The positive pulse output terminal of the CD4047 monostable multivibrator chip is set as the positive pulse output terminal of the load pulse control module 3.

[0027] The constant load and switching module 4 includes a TL431 reference source, a first LM358 operational amplifier, a first power MOSFET, a second power MOSFET, a fourth resistor, a fifth resistor, and a current sensing resistor. The reference and cathode of the TL431 reference source are shorted and connected to the non-inverting input of the first LM358 operational amplifier and one end of the fourth resistor. The other end of the fourth resistor is energized. The anode of the TL431 reference source is grounded. The output of the first LM358 operational amplifier is connected to the gate of the second power MOSFET, and the inverting input of the first LM358 operational amplifier is connected to the second power MOSFET. The source of the MOSFET and one end of the current sensing resistor are connected to the positive power supply of the first LM358 operational amplifier, and the negative power supply of the first LM358 operational amplifier is grounded. The gate of the first power MOSFET is connected to the positive pulse output terminal of the load pulse control module 3 through the fifth resistor. The drain of the first power MOSFET is connected to the drain of the second power MOSFET. The source of the first power MOSFET is connected to the positive terminal of the battery in the communication cabinet. The source of the second power MOSFET is connected to the inverting input terminal of the first LM358 operational amplifier and one end of the current sensing resistor. The other end of the current sensing resistor is grounded.

[0028] The signal sampling and processing module 5 includes a second LM358 operational amplifier, a CD4066 quad bidirectional analog switch chip, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a holding capacitor, and a potentiometer. The non-inverting input of the second LM358 operational amplifier is connected to the positive terminal of the battery in the communication cabinet through the sixth resistor. The inverting input of the second LM358 operational amplifier is connected to the positive terminal of the battery in the communication cabinet through the seventh resistor. The inverting input of the second LM358 operational amplifier is connected to its output terminal through the eighth resistor. The inverting input of the second LM358 operational amplifier is connected to the sliding terminal of the potentiometer through the ninth resistor. The first fixed terminal of the potentiometer is energized, and the second fixed terminal of the potentiometer is grounded. The output terminal of the second LM358 operational amplifier is connected to the input terminal of the first switch of the CD4066 quad bidirectional analog switch chip. The control terminal of the first switch of the CD4066 quad bidirectional analog switch chip is set as the analog switch control terminal. The output terminal of the first switch of the CD4066 quad bidirectional analog switch chip is connected to one end of the holding capacitor. The other end of the holding capacitor is set as the signal voltage output terminal of the signal sampling and processing module 5.

[0029] Threshold comparison and alarm output module 6 includes an LM393 dual voltage comparator, a CD4043 quad NOR gate RS latch chip, an optocoupler, a tenth resistor, an eleventh resistor, and an adjustable potentiometer. The non-inverting input of the first comparator in the LM393 dual voltage comparator is set as the signal voltage input. The non-inverting input of the first comparator in the LM393 dual voltage comparator is connected to the signal voltage output of the signal sampling and processing module 5. The inverting input of the first comparator in the LM393 dual voltage comparator is connected to the sliding contact of the adjustable potentiometer. The output of the first comparator in the comparator is connected to power through the tenth resistor. The output of the first comparator in the LM393 dual voltage comparator is connected to the set terminal of the first latch of the CD4043 quad NOR gate RS latch chip. The output of the first latch of the CD4043 quad NOR gate RS latch chip is connected to the anode of the light-emitting diode in the optocoupler through the eleventh resistor. The cathode of the light-emitting diode in the optocoupler is grounded. The collector and emitter of the phototransistor in the optocoupler are set as alarm signal output terminals. The two fixed terminals of the adjustable potentiometer are connected to power and ground respectively.

[0030] When the communication cabinet is in operation, the battery dynamic internal resistance monitoring alarm circuit starts with the periodic start of the timing control module 2. Its NE555 timer chip continuously generates trigger pulse signals with fixed time intervals through the configuration of external resistors and capacitors. These signals are sent to the trigger input terminal of the load pulse control module 3.

[0031] The CD4047 monostable multivibrator chip in the load pulse control module 3 is activated immediately after receiving the trigger signal. It sends out a positive pulse signal with a strictly limited width and stable amplitude from its positive pulse output terminal. One of these pulse signals is sent directly to the gate of the first power MOSFET in the constant load and switching module 4, while the other is guided to the control terminal of the CD4066 quad bidirectional analog switch chip in the signal sampling and processing module 5 after being appropriately delayed by the RC delay circuit. The timing coordination of these two signals is crucial.

[0032] Upon receiving the positive pulse signal, the constant load and switching module 4 immediately activates, turning on the first power MOSFET to connect the subsequent constant current load circuit to the positive terminal of the battery under test. This constant current load circuit is provided with a high-precision voltage reference by a TL431 adjustable precision reference source. The first LM358 operational amplifier forms a negative feedback control loop, driving the second power MOSFET to operate, forcing the current flowing through the current sensing resistor to remain constant, thus applying a short-term but precisely known current load to the battery.

[0033] Meanwhile, the second LM358 operational amplifier in the signal sampling and processing module 5 has already connected its non-inverting and inverting input terminals to the positive terminal of the battery, forming a differential amplifier circuit. When the delayed control pulse finally reaches the control terminal of the CD4066 analog switch, the analog switch is turned on instantly, quickly capturing and storing the voltage signal output by the differential amplifier at this moment, which reflects the difference between the battery load voltage and the no-load voltage, on the holding capacitor. After that, the analog switch is turned off, and the voltage value is firmly held.

[0034] The threshold comparison and alarm output module 6 continuously monitors the voltage on the holding capacitor. The first comparator of the LM393 dual voltage comparator compares its non-inverting input and inverting input in real time. Once it finds that the voltage on the holding capacitor exceeds the set safety threshold, the comparator output immediately flips and sends a set signal to the set terminal of the CD4043 quad NOR gate RS latch chip. The latch state changes and locks, and its output drives the light-emitting diode in the optocoupler to light up, thereby turning on the phototransistor and finally sending a continuous and stable alarm signal to the outside.

[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mobile communication outdoor multi-union cabinet, characterized in that, The device includes a communication cabinet body (1) and a battery dynamic internal resistance monitoring and alarm circuit. The battery dynamic internal resistance monitoring and alarm circuit is electrically connected to the battery in the communication cabinet body (1). The battery dynamic internal resistance monitoring and alarm circuit applies a short standard current load to the battery periodically and samples its terminal voltage change synchronously. It compares the change value with a preset threshold and issues a continuous and stable alarm signal when the limit is exceeded.

2. The outdoor multi-connection cabinet for mobile communication according to claim 1, characterized in that, The battery dynamic internal resistance monitoring and alarm circuit includes a timing control module (2), a load pulse control module (3), a constant load and switch module (4), a signal sampling and processing module (5), and a threshold comparison and alarm output module (6). The timing control module (2) provides a periodic trigger signal to the load pulse control module (3). The output terminal of the timing control module (2) is connected to the trigger input terminal of the load pulse control module (3). The load pulse control module (3) sends a load on / off control signal to the constant load and switch module (4). The positive pulse output terminal of the load pulse control module (3) is connected to the control terminal of the constant load and switch module (4). The positive pulse output terminal of module (3) is connected to the analog switch control terminal of signal sampling and processing module (5) through a delay circuit. The load current output terminal of constant load and switch module (4) is connected to the positive terminal of the battery in the communication cabinet body (1). The voltage differential sampling terminal of signal sampling and processing module (5) is connected to the positive terminal of the battery in the communication cabinet body (1). The signal voltage output terminal of signal sampling and processing module (5) is connected to the signal voltage input terminal of threshold comparison and alarm output module (6). The threshold voltage setting terminal of threshold comparison and alarm output module (6) is used to connect to an adjustable reference potential. The signal output terminal of threshold comparison and alarm output module (6) outputs an alarm signal.

3. The outdoor multi-communication cabinet of claim 2, wherein, The timing control module (2) includes an NE555 timer chip, a first resistor, a second resistor, and a first capacitor. The reset terminal and power supply terminal of the NE555 timer chip are energized. The ground terminal of the NE555 timer chip is grounded. The discharge terminal of the NE555 timer chip is connected to one end of the first resistor. The other end of the first resistor is energized. The discharge terminal of the NE555 timer chip is connected to one end of the second resistor. The other end of the second resistor, the trigger terminal of the NE555 timer chip, and the threshold terminal of the NE555 timer chip are all connected to one end of the first capacitor. The other end of the first capacitor is grounded. The output terminal of the NE555 timer chip is set as the output terminal of the timing control module (2).

4. The outdoor multi-communication cabinet of claim 2, wherein, The load pulse control module (3) includes a CD4047 monostable multivibrator chip, a third resistor, and a second capacitor. The power supply terminal of the CD4047 monostable multivibrator chip is connected to power, the ground terminal of the CD4047 monostable multivibrator chip is grounded, the positive trigger terminal of the CD4047 monostable multivibrator chip is connected to the output terminal of the timing control module (2), the asynchronous reset terminal of the CD4047 monostable multivibrator chip is connected to power, the asynchronous set terminal of the CD4047 monostable multivibrator chip is grounded, the common terminal of the external resistor and capacitor of the CD4047 monostable multivibrator chip is connected to one end of the third resistor and one end of the second capacitor, the other end of the third resistor is connected to the external resistor terminal of the CD4047 monostable multivibrator chip, the external capacitor terminal of the CD4047 monostable multivibrator chip and the external resistor terminal are connected to the other end of the second capacitor, and the positive pulse output terminal of the CD4047 monostable multivibrator chip is set as the positive pulse output terminal of the load pulse control module (3).

5. The outdoor multi-communication cabinet of claim 2, wherein, The constant load and switching module (4) includes a TL431 reference source, a first LM358 operational amplifier, a first power MOS transistor, a second power MOS transistor, a fourth resistor, a fifth resistor, and a current sensing resistor. The reference terminal and cathode of the TL431 reference source are shorted and connected to the non-inverting input terminal of the first LM358 operational amplifier and one end of the fourth resistor. The other end of the fourth resistor is energized. The anode of the TL431 reference source is grounded. The output terminal of the first LM358 operational amplifier is connected to the gate of the second power MOS transistor. The inverting input terminal of the first LM358 operational amplifier is connected to the second power MOS transistor. The source of the S-tube, one end of the current sensing resistor, the positive power supply terminal of the first LM358 operational amplifier is connected to the power supply, the negative power supply terminal of the first LM358 operational amplifier is grounded, the gate of the first power MOSFET is connected to the positive pulse output terminal of the load pulse control module (3) through the fifth resistor, the drain of the first power MOSFET is connected to the drain of the second power MOSFET, the source of the first power MOSFET is connected to the positive terminal of the battery in the communication cabinet, the source of the second power MOSFET is connected to the inverting input terminal of the first LM358 operational amplifier and one end of the current sensing resistor, and the other end of the current sensing resistor is grounded.

6. A mobile communication outdoor multi-unit cabinet according to claim 2, characterized in that, The signal sampling and processing module (5) includes a second LM358 operational amplifier, a CD4066 quad bidirectional analog switch chip, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a holding capacitor, and a potentiometer. The non-inverting input terminal of the second LM358 operational amplifier is connected to the positive terminal of the battery in the communication cabinet through the sixth resistor. The inverting input terminal of the second LM358 operational amplifier is connected to the positive terminal of the battery in the communication cabinet through the seventh resistor. The inverting input terminal of the second LM358 operational amplifier is connected to its output terminal through the eighth resistor. The inverting input terminal of the second LM358 operational amplifier is connected to the sliding terminal of the potentiometer through the ninth resistor. The first fixed terminal of the potentiometer is energized, and the second fixed terminal of the potentiometer is grounded. The output terminal of the second LM358 operational amplifier is connected to the input terminal of the first switch of the CD4066 quad bidirectional analog switch chip. The control terminal of the first switch of the CD4066 quad bidirectional analog switch chip is set as the analog switch control terminal. The output terminal of the first switch of the CD4066 quad bidirectional analog switch chip is connected to one end of the holding capacitor. The other end of the holding capacitor is set as the signal voltage output terminal of the signal sampling and processing module (5).

7. A mobile communication outdoor multi-unit cabinet according to claim 2, characterized in that, The threshold comparison and alarm output module (6) includes an LM393 dual voltage comparator, a CD4043 quad NOR gate RS latch chip, an optocoupler, a tenth resistor, an eleventh resistor, and an adjustable potentiometer. The non-inverting input of the first comparator in the LM393 dual voltage comparator is set as the signal voltage input. The non-inverting input of the first comparator in the LM393 dual voltage comparator is connected to the signal voltage output of the signal sampling and processing module (5). The inverting input of the first comparator in the LM393 dual voltage comparator is connected to the sliding end of the adjustable potentiometer. The output of the first comparator in the voltage comparator is connected to power through the tenth resistor. The output of the first comparator in the LM393 dual voltage comparator is connected to the set terminal of the first latch of the CD4043 quad NOR gate RS latch chip. The output of the first latch of the CD4043 quad NOR gate RS latch chip is connected to the anode of the light-emitting diode in the optocoupler through the eleventh resistor. The cathode of the light-emitting diode in the optocoupler is grounded. The collector and emitter of the phototransistor in the optocoupler are set as alarm signal output terminals. The two fixed terminals of the adjustable potentiometer are connected to power and ground respectively.

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