Self-powered ultra-low power consumption ocean anticorrosion off-line data monitoring device

Abstract

The utility model discloses a self-powered ultra-low power consumption ocean anticorrosion off-line data monitoring device, which comprises a main control module, a power supply module and a function module, and the function module comprises an acquisition control module, a protection module, a communication module and a data internal and external dual-storage module. The power supply module integrates an external power supply and a built-in power supply battery, can be automatically switched between two power supply modes according to an instruction of the main control module, and independently cuts off or recovers the power supply of each module in the functional modules except the main control module in the battery power supply mode, so that the average power consumption is remarkably reduced, and the power consumption is reduced. And super-long unattended operation from several weeks to several months is realized. The collected data is stored through a two-stage architecture which is firstly internally cached and then transferred to the external storage module, so that the anti-corrosion data can be safely, completely and reliably stored off line in a file form in a harsh marine environment, and the technical problems that the data cannot be stored, cannot be transmitted out and is easy to lose in the harsh environment are fundamentally solved.

Description

Technical Field

[0001] This utility model relates to the field of marine engineering monitoring technology, and in particular to a self-powered, ultra-low power consumption marine corrosion prevention offline data monitoring device. Background Technology

[0002] Offshore platform steel structures are susceptible to corrosion in seawater environments and are typically protected using impressed current cathodic protection (ICCP) systems. In the early stages of platform construction, stable power supplies, data communication facilities, and on-duty personnel are often lacking, yet monitoring of corrosion protection effectiveness remains crucial at this phase. Existing monitoring systems mostly rely on external large batteries for power, which suffer from drawbacks such as large size and weight, inconvenient installation, high power consumption leading to significantly shorter operating times than theoretically possible, and unreliable offline data storage. These systems cannot meet the needs of unattended monitoring operations lasting weeks or even months. Utility Model Content

[0003] This invention provides a self-powered, ultra-low power consumption marine corrosion prevention offline data monitoring device to overcome the above-mentioned technical problems.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A self-powered, ultra-low power consumption marine corrosion-resistant offline data monitoring device includes a main control module, a power supply module, and functional modules.

[0006] The functional modules include an acquisition and control module, a protection module, a communication module, and a dual internal and external data storage module;

[0007] The main control module integrates multiple data interfaces, which are used to generate anti-corrosion data records and control commands, and output corresponding control commands to various modules in the functional modules through the data interfaces, thereby switching the device's working mode. The data interfaces include analog-to-digital conversion interfaces, general ports, and communication interfaces.

[0008] The power module has a built-in battery and is connected to an external power source. It is used to power the main control module and the functional modules. It is also used to automatically switch between external power supply and battery power supply according to the control command of the main control module. In battery power supply mode, it can independently cut off or restore the power supply of each module in the functional modules other than the main control module, thereby enabling the device to switch between working state and sleep state.

[0009] The acquisition and control module is connected to the main control module through an analog-to-digital conversion interface and is used to acquire analog signals from the marine corrosion protection system.

[0010] The protection module is connected to the general port of the main control module and is used to monitor the power supply and operating status of the device, and to perform hardware reset or cut off the relevant power supply according to the safety instructions issued by the main control module.

[0011] The communication module is connected to the communication interface of the main control module to realize bidirectional communication between the main control module and the host computer.

[0012] The dual internal and external data storage module is connected to the general-purpose port of the main control module, which includes:

[0013] An internal storage module, integrated within the main control module, is used for temporary storage of anti-corrosion data records;

[0014] An external storage module is used to write the corrosion prevention data records into the corresponding storage medium.

[0015] Furthermore, the power module includes a power detection module, a power control module, a power supply mode switching module, and a voltage conversion module;

[0016] The input terminal of the power detection module is connected to the output terminal of the power supply battery and the external power interface. It is used to monitor the voltage, battery capacity and health status of the two power supplies in real time, and output the detected analog signal to the main control module.

[0017] The input terminal of the power control module is used to receive signals from the power detection module and control commands from the main control module, and generate three control signals. The first control signal is used to control the operation of the power supply mode switching module, the second control signal is used to control the enable state of the voltage conversion module, and the third control signal is used to control the power supply mode of the functional module, i.e., switching between working state and sleep state.

[0018] The power supply mode switching module has two input terminals, which are respectively connected to the power supply battery and the external power interface, and its output terminal is connected to the power bus; the power supply mode switching module is used to switch between external power supply and battery power supply under manual or control command of the power control module.

[0019] The input terminal of the voltage conversion module is connected to the power bus and is used to convert the input voltage into different levels required by each module in the functional module.

[0020] Furthermore, the voltage conversion module includes a buck converter chip U1; the power supply mode switching module includes a first low-power linear regulator chip U2; and the power detection module includes a second low-power linear regulator chip U3.

[0021] The input terminal of the step-down converter chip U1 is connected to the power bus to supply power to each module in the functional modules other than the main control module.

[0022] The enable pin EN of the buck converter chip U1 is connected to the second control signal of the power control module, and the main control module controls the switching of the buck converter chip U1 through the enable pin EN.

[0023] The input terminals of the first low-power linear regulator chip U2 and the second low-power linear regulator chip U3 are connected to the power bus or a pre-regulated voltage to power the main control module and its peripheral circuits in sleep mode.

[0024] Furthermore, the voltage conversion module also includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first inductor L1, and a first diode D1.

[0025] The input pin VIN of the buck converter chip U1 is connected to the output terminal of the power supply mode switching module through a first capacitor C1, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4 connected in parallel.

[0026] One end of the first resistor R1 is connected to the enable pin EN of the buck converter chip U1, and the other end is grounded;

[0027] The output pin SW of the buck converter chip U1 is connected to the power input terminal of the subsequent circuit through the first inductor L1, so as to supply power to each module in the functional modules other than the main control module.

[0028] The feedback pin FB of the buck converter chip U1 is connected to one end of the second resistor R2. The other end of the second resistor R2 is connected to one end of the third resistor R3 and the fifth resistor R5 respectively. The other end of the third resistor R3 is grounded. The other end of the fifth resistor R5 is connected to one end of the fourth resistor R4. The other end of the fourth resistor R4 is connected to the power input terminal of the subsequent circuit. The two ends of the sixth capacitor C6 are connected to the second resistor R2 and the power input terminal of the subsequent circuit respectively. The seventh capacitor C7 and the eighth capacitor C8 are connected in parallel, with one end grounded and the other end connected to the power input terminal of the subsequent circuit.

[0029] One end of the fifth capacitor C5 is connected to the first pin BOOT of the buck converter chip U1, and the other end is connected to the first inductor L1; one end of the first diode D1 is connected to the first inductor L1, and the other end is grounded.

[0030] Furthermore, the power supply mode switching module also includes a second diode D2, a third diode D3, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, and a second inductor L2.

[0031] One end of the second diode D2 is connected to the external power input terminal and the power supply battery input terminal, respectively, and the other end is connected to the second pin VIN and the third pin EN of the first low-power linear regulator chip U2;

[0032] One end of the ninth capacitor C9 and the tenth capacitor C10 are both connected to the second diode D2, and the other end is grounded.

[0033] One end of the eleventh capacitor C11 is connected to the first pin BOOT of the first low-power linear regulator chip U2, and the other end is connected to the second inductor L2.

[0034] One end of the second inductor L2 is connected to one end of the third diode D3, and the other end is connected to the power supply terminal of the battery.

[0035] One end of the sixth resistor R6 is connected to the fifth pin FB of the first low-power linear regulator chip U2, and the other end is connected to the eighth resistor R8. The other end of the eighth resistor R8 is connected to the seventh resistor R7, and the other end of the seventh resistor R7 is connected to the power supply terminal of the power supply battery.

[0036] One end of the ninth resistor R9 is connected to the eighth resistor R8, and the other end is grounded;

[0037] The two ends of the twelfth capacitor C12 are connected to the eighth resistor R8 and the power supply terminal of the battery, respectively.

[0038] Furthermore, the power detection module also includes a fourth diode D4, a common cathode dual diode D5, a third inductor L3, a thirteenth capacitor C13, a fourteenth capacitor C14, a fifteenth capacitor C15, a sixteenth capacitor C16, a seventeenth capacitor C17, an eighteenth capacitor C18, a nineteenth capacitor C19, a twentieth capacitor C20, a twenty-first capacitor C21, a twenty-second capacitor C22, a twenty-third capacitor C23, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, and a thirteenth resistor R13;

[0039] The thirteenth capacitor C13, the fourteenth capacitor C14, and the fifteenth capacitor C15 are connected in parallel and connected to the power supply terminal of the power supply battery, the second pin VIN and the third pin EN of the second low-power linear regulator chip U3.

[0040] One end of the sixteenth capacitor C16 is connected to the first pin BOOT of the second low-power linear regulator chip U3, and the other end is connected to the third inductor L3;

[0041] One end of the third inductor L3 is connected to one end of the fourth diode D4, and the other end is connected to the eleventh resistor R11;

[0042] One end of the eleventh resistor R11 is connected to the twelfth resistor R12, the other end of the twelfth resistor R12 is connected to the tenth resistor R10 and the thirteenth resistor R13 respectively, the other end of the tenth resistor R10 is connected to the fifth pin FB of the second low-power linear regulator chip U3, and the other end of the thirteenth resistor R13 is grounded.

[0043] The two ends of the seventeenth capacitor C17 are respectively connected to the eleventh resistor R11 and the twelfth resistor R12;

[0044] The eighteenth capacitor C18, the nineteenth capacitor C19, and the twentieth capacitor C20 are connected in parallel, and their two ends are respectively connected to the eleventh resistor R11 and ground.

[0045] After the 21st capacitor C21, the 22nd capacitor C22, and the 23rd capacitor C23 are connected in parallel, their two ends are connected to a 3.3V external power supply and ground, respectively.

[0046] The two input terminals of the common cathode dual diode D5 are connected to the eleventh resistor R11 and the power supply battery, respectively, and the output terminal is connected to a 3.3V external power supply.

[0047] Beneficial Effects: This invention integrates an external power supply with an internal battery and incorporates an automatic switching function, achieving self-powered operation without relying on a large external battery. The main control module manages the power supply to the power module. When powered by the battery, it controls the power supply to each module within the functional modules, switching the system to a very low-power sleep state during non-operational periods. This significantly reduces average power consumption, enabling extended unattended operation for weeks to months, making it suitable for environments such as marine platforms where stable power supplies are lacking in the early stages of construction. This invention employs a dual-level data management architecture of internal and external storage. Based on this architecture, processed data is first temporarily stored in the internal storage module within the main control module before being transferred to the external storage module. This design not only provides data buffering, but more importantly, it stores data in the form of files on independent physical media such as SD cards for a long time, without relying on any network or continuous power supply. This ensures that data can be completely, reliably, and securely stored offline in harsh marine environments with no network, high humidity, and high salinity. Data can also be directly retrieved physically via a card reader after the task is completed, effectively solving the problems of data not being able to be stored, transmitted, or easily lost in harsh environments. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the structure of a self-powered ultra-low power marine corrosion-resistant offline data monitoring device according to the present invention;

[0050] Figure 2 This is a schematic diagram of the power module structure in an embodiment of the present invention;

[0051] Figure 3 This is a schematic diagram of the voltage conversion module in an embodiment of the present invention;

[0052] Figure 4 This is a schematic diagram of the power supply mode switching module in an embodiment of the present invention;

[0053] Figure 5 This is a schematic diagram of the power detection module in an embodiment of the present invention. Detailed Implementation

[0054] 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, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0055] This embodiment provides a self-powered, ultra-low power consumption marine corrosion prevention offline data monitoring device, such as... Figure 1 As shown, it includes a main control module, a power supply module, and functional modules;

[0056] The functional modules include an acquisition and control module, a protection module, a communication module, and a dual internal and external data storage module;

[0057] The main control module integrates multiple data interfaces, which are used to generate anti-corrosion data records and control commands, and output corresponding control commands to various modules in the functional modules through the data interfaces, thereby switching the device's working mode. The data interfaces include analog-to-digital conversion interfaces, general ports, and communication interfaces.

[0058] Specifically, the main control module integrates an ADC unit, whose ADC input is connected to the output of the acquisition and control module. It receives the conditioned anti-corrosion analog signal and converts it into a digital signal. The main control module runs a built-in control program to control the system's operating mode switching, control the acquisition timing, process the acquired digital signals and generate anti-corrosion data records, and manage the data storage and communication.

[0059] The power module has a built-in battery and is connected to an external power source. It is used to power the main control module and the functional modules. It is also used to automatically switch between external power supply and battery power supply according to the control command of the main control module. In battery power supply mode, it can independently cut off or restore the power supply of each module in the functional modules other than the main control module, thereby enabling the device to switch between working state and sleep state; thus realizing the system switching between high power full-function working state and ultra-low power sleep standby state.

[0060] The acquisition and control module is connected to the main control module through an analog-to-digital conversion interface and is used to acquire analog signals from the marine corrosion protection system.

[0061] Specifically, the acquisition and control module controls multiple conditioned anti-corrosion simulation signals according to preset logic and sequence, and sequentially connects them to the analog-to-digital converter (ADC) input channel in the main control module for analog-to-digital conversion. The acquisition and control module includes at least 32 reference electrode (RE) signal acquisition channels, at least 8 anode current (MA) signal acquisition channels, and acquisition control circuit. Each acquisition channel is set in parallel and has a built-in signal conditioning circuit, which is used to amplify and condition the input anti-corrosion simulation signals (such as potential and current signals) and adjust their voltage to the acquisition range of the ADC.

[0062] The protection module is connected to the general port of the main control module and is used to monitor the power supply and operating status of the device, and to perform hardware reset or cut off the relevant power supply according to the safety instructions issued by the main control module.

[0063] Specifically, the protection module monitors the system power supply, signal input, and operating status. When it detects errors such as overvoltage, overcurrent, or program crash, it executes a hardware reset or cuts off the relevant power supply according to the safety instructions issued by the main control module, and attempts to restore system operation after the fault is eliminated.

[0064] The communication module is connected to the communication interface of the main control module to realize bidirectional communication between the main control module and the host computer.

[0065] Specifically, the communication module converts the Modbus RTU protocol commands from the host computer into TTL signals and transmits them to the main control module, or converts the TTL signals from the main control module into RS-485 signals and uploads them for parameter configuration, real-time data reading, or mode control. The communication module includes an RS-485 interface chip and its peripheral circuits, which are connected to the main control module via an asynchronous serial bus (UART / TTL level).

[0066] The dual internal and external data storage module is connected to the general-purpose port of the main control module, which includes:

[0067] The internal storage module, also known as the internal cache, is integrated inside the main control module and is used for temporary storage of anti-corrosion data records.

[0068] An external storage module, or pluggable external storage medium interface, is used to write the corrosion-resistant data records into the corresponding storage medium.

[0069] Specifically, the pluggable external storage medium interface is used for long-term offline data storage. The main control module controls the writing of data records from the internal storage module into the external storage module in .csv file format, thereby achieving long-term offline data storage.

[0070] Specifically, the external storage is preferably an SD card slot and driving circuit. It employs a storage method combining built-in Flash buffer and an external SD card file system. Data is saved in a common file format and can be directly read by a card reader without communication requirements, ensuring data integrity and ease of access even in harsh communication environments.

[0071] Specifically, to address the issue of insufficient power supply in marine environments, this embodiment sets the marine corrosion prevention offline data monitoring device to operate in a low-power mode powered by a battery under normal conditions. The power control module controls the voltage conversion module to only enable low-power voltage regulator chips such as U2 and U3 to supply power to the main control module and necessary circuits. When an external power source is available, the main control module enables all voltage conversion units, including U1, through the power control module, and the system enters a fully functional normal operating mode.

[0072] Specifically, during data acquisition, the main control module controls the acquisition control circuit to sequentially select multiple RE / MA acquisition channels. The conditioned analog signals are then converted into digital signals by the main control module's built-in ADC. The main control module processes and encapsulates the digital signals, generating timestamped data records. These records are first stored in the internal Flash memory and then transferred to an external SD card via the SPI bus.

[0073] Specifically, through an innovative power architecture design (controllable branched power supply and selection of ultra-low quiescent current chips), the solution of external large batteries is abandoned. All circuits are integrated into a sealed chassis, making it small in size, lightweight, and easy to install at sea. It also has the ability to provide dual power supply from batteries and external power sources with automatic switching capability. This reduces the average operating current of the device to as low as 0.5mA (dormant) level. Combined with a high-capacity battery pack, it can theoretically achieve more than 6 months of unattended offline operation.

[0074] This embodiment enables automatic intervention in anomalies such as overvoltage, overcurrent, and program crashes by calling the protection module through the main control module. This improves the system's self-protection and self-recovery capabilities in unattended operation and ensures the stable operation of the device in harsh marine environments.

[0075] In a specific embodiment, such as Figure 2 As shown, the power module includes a power detection module, a power control module, a power supply mode switching module, and a voltage conversion module;

[0076] The input terminal of the power detection module is connected to the output terminal of the power supply battery and the external power interface. It is used to monitor the voltage, battery capacity and health status of the two power supplies in real time, and output the detected analog signal to the main control module.

[0077] The input terminal of the power control module is used to receive signals from the power detection module and control commands from the main control module, and generate three control signals. The first control signal is used to control the operation of the power supply mode switching module, the second control signal is used to control the enable state of the voltage conversion module, and the third control signal is used to control the power supply mode of the functional module, i.e., switching between working state and sleep state.

[0078] The power supply mode switching module has two input terminals, which are respectively connected to the power supply battery and the external power interface, and its output terminal is connected to the power bus; the power supply mode switching module is used to switch between external power supply and battery power supply under manual or control command of the power control module.

[0079] Specifically, in this embodiment, the power supply battery is a 21700 type lithium battery pack, and the arrangement and number of battery panels can be adjusted as needed to flexibly configure the backup capacity.

[0080] The input terminal of the voltage conversion module is connected to the power bus and is used to convert the input 12V voltage into different levels required by each module in the functional module, including but not limited to +5V, -5V, and +3.3V.

[0081] Specifically, the voltage conversion module includes multiple voltage conversion units, wherein at least one voltage conversion unit is controlled by the second control signal of the power control module, and is enabled only when the device is woken up and enters the acquisition state, and is turned off in the low-power sleep state to cut off the power supply to most of the functional circuits.

[0082] In a specific embodiment, the voltage conversion module includes a buck converter chip U1; the power supply mode switching module includes a first low-power linear regulator chip U2; and the power detection module includes a second low-power linear regulator chip U3.

[0083] The input terminal of the buck converter chip U1 is connected to the power bus and outputs a +5V voltage to power each module in the functional modules other than the main control module. The enable pin EN of the buck converter chip U1 is connected to the second control signal of the power control module, and the main control module controls the switching of the buck converter chip U1 through the enable pin EN.

[0084] The input terminals of the first low-power linear regulator chip U2 and the second low-power linear regulator chip U3 are connected to the power bus or a pre-regulated voltage, and output voltages such as +3.3V respectively, which are used to power the main control module and its peripheral circuits in the sleep state.

[0085] Specifically, the first low-power linear regulator chip U2 and the second low-power linear regulator chip U3 have a quiescent operating current in the microampere range.

[0086] Specifically, the buck converter chip U1 is a buck converter with a wide input voltage range and an output current of up to 2A. It has extremely low quiescent current and its voltage conversion can be enabled and disabled by the control signal from the main control module. The 5V output voltage powers all functional modules in the circuit except for the main control module. Under the control of the main control module, voltage conversion is only activated when needed and stopped when not needed, then the circuit enters standby mode. Due to the extremely low power consumption of the buck converter chip U1, combined with power control logic, power loss in low-power mode is minimized. U2 and U3 are two voltage conversion chips with extremely low power consumption, with quiescent current in the microamp range. In low-power mode, they can provide the required voltage to the main control module, and their extremely low losses provide a basis for long-term low-power operation of the device, ensuring the normal low-power operation of the main control module.

[0087] In a specific embodiment, such as Figure 3As shown, the voltage conversion module also includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first inductor L1, and a first diode D1.

[0088] The input pin VIN of the buck converter chip U1 is connected to the output terminal of the power supply mode switching module (i.e., the system power bus, typically 12V) through a parallel connection of the first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4.

[0089] One end of the first resistor R1 is connected to the enable pin EN of the buck converter chip U1, and the other end is grounded;

[0090] The ground pin GND of the buck converter chip U1 is connected to the common ground;

[0091] The output pin SW of the buck converter chip U1 is connected to the power input terminal (output +5V voltage) of the subsequent circuit through the first inductor L1, so as to supply power to each module in the functional modules other than the main control module (such as the conditioning circuit of the acquisition and control module, the interface chip of the communication module, etc.).

[0092] The feedback pin FB of the buck converter chip U1 is connected to one end of the second resistor R2. The other end of the second resistor R2 is connected to one end of the third resistor R3 and the fifth resistor R5 respectively. The other end of the third resistor R3 is grounded. The other end of the fifth resistor R5 is connected to one end of the fourth resistor R4. The other end of the fourth resistor R4 is connected to the power input terminal of the subsequent circuit. The two ends of the sixth capacitor C6 are connected to the second resistor R2 and the power input terminal of the subsequent circuit respectively. The seventh capacitor C7 and the eighth capacitor C8 are connected in parallel, with one end grounded and the other end connected to the power input terminal of the subsequent circuit.

[0093] One end of the fifth capacitor C5 is connected to the first pin BOOT of the buck converter chip U1, and the other end is connected to the first inductor L1; one end of the first diode D1 is connected to the first inductor L1, and the other end is grounded.

[0094] In a specific embodiment, such as Figure 4 As shown, the power supply mode switching module also includes a second diode D2, a third diode D3, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, and a second inductor L2.

[0095] One end of the second diode D2 is connected to the external power input terminal and the power supply battery input terminal, respectively, and the other end is connected to the second pin VIN and the third pin EN of the first low-power linear regulator chip U2;

[0096] One end of the ninth capacitor C9 and the tenth capacitor C10 are both connected to the second diode D2, and the other end is grounded.

[0097] One end of the eleventh capacitor C11 is connected to the first pin BOOT of the first low-power linear regulator chip U2, and the other end is connected to the second inductor L2.

[0098] One end of the second inductor L2 is connected to one end of the third diode D3, and the other end is connected to the power supply terminal of the battery.

[0099] One end of the sixth resistor R6 is connected to the fifth pin FB of the first low-power linear regulator chip U2, and the other end is connected to the eighth resistor R8. The other end of the eighth resistor R8 is connected to the seventh resistor R7, and the other end of the seventh resistor R7 is connected to the power supply terminal of the power supply battery.

[0100] One end of the ninth resistor R9 is connected to the eighth resistor R8, and the other end is grounded;

[0101] The two ends of the twelfth capacitor C12 are connected to the eighth resistor R8 and the power supply terminal of the battery, respectively.

[0102] Specifically, because the external power supply voltage is higher than the battery voltage, the third diode D3 conducts due to the forward bias of the external power supply side, supplying power to the main control module, while simultaneously blocking the current to the battery due to reverse bias. When the external power supply is unexpectedly interrupted or the voltage drops below the battery voltage, the diode on the battery side becomes forward biased and automatically takes over supplying power to the main control module, achieving seamless switching.

[0103] In a specific embodiment, such as Figure 5 As shown, the power detection module also includes a fourth diode D4, a common cathode dual diode D5, a third inductor L3, a thirteenth capacitor C13, a fourteenth capacitor C14, a fifteenth capacitor C15, a sixteenth capacitor C16, a seventeenth capacitor C17, an eighteenth capacitor C18, a nineteenth capacitor C19, a twentieth capacitor C20, a twenty-first capacitor C21, a twenty-second capacitor C22, a twenty-third capacitor C23, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, and a thirteenth resistor R13;

[0104] The thirteenth capacitor C13, the fourteenth capacitor C14, and the fifteenth capacitor C15 are connected in parallel and connected to the power supply terminal of the power supply battery, the second pin VIN and the third pin EN of the second low-power linear regulator chip U3.

[0105] One end of the sixteenth capacitor C16 is connected to the first pin BOOT of the second low-power linear regulator chip U3, and the other end is connected to the third inductor L3;

[0106] One end of the third inductor L3 is connected to one end of the fourth diode D4, and the other end is connected to the eleventh resistor R11;

[0107] One end of the eleventh resistor R11 is connected to the twelfth resistor R12, the other end of the twelfth resistor R12 is connected to the tenth resistor R10 and the thirteenth resistor R13 respectively, the other end of the tenth resistor R10 is connected to the fifth pin FB of the second low-power linear regulator chip U3, and the other end of the thirteenth resistor R13 is grounded.

[0108] The two ends of the seventeenth capacitor C17 are respectively connected to the eleventh resistor R11 and the twelfth resistor R12;

[0109] The eighteenth capacitor C18, the nineteenth capacitor C19, and the twentieth capacitor C20 are connected in parallel, and their two ends are respectively connected to the eleventh resistor R11 and ground.

[0110] After the 21st capacitor C21, the 22nd capacitor C22, and the 23rd capacitor C23 are connected in parallel, their two ends are connected to a 3.3V external power supply and ground, respectively.

[0111] The two input terminals of the common cathode dual diode D5 are connected to the eleventh resistor R11 and the power supply battery, respectively, and the output terminal is connected to a 3.3V external power supply.

[0112] Specifically, in low-power mode, the measured actual current is 0.5mA; in acquisition mode, the measured actual current is 26mA, of which approximately 6mA is from the LED for 5 seconds; in chip-only operation mode, the operating current is 11mA for 3 seconds. Using a 3-hour wake-up interval (the LED is removed in practice), and assuming a current of 20mA in acquisition mode, the power consumption over 24 hours is:

[0113] Sleep power consumption: 0.5mA × 24H = 12mAH;

[0114] Operating power consumption: 20mA×8×5s / 3600s 0.22 mAH;

[0115] Individual power consumption: 11mA×8×3s / 3600s 0.0733 mAH;

[0116] Total daily power consumption: 12mAH + 0.22mAH + 0.0733mAH 12.3 mAH;

[0117] The current theoretical battery design capacity is 10000mA, and the theoretical offline duration is:

[0118] 10000 ÷ 12.3 813 days (theoretical limit);

[0119] Battery self-discharge is calculated at 3.5% of battery capacity per month. The total power consumption for six months of operation is:

[0120] 183×12.3mAH+10000mAH×3.5%×6=4350.9mAH.

[0121] Based on the above calculations, the total consumption over 6 months is approximately 45%. Considering that the battery's rated capacity may be insufficient or degraded (the minimum capacity in the datasheet is 9800mAh), and according to the battery discharge curve, as the charge decreases, the voltage will gradually decrease (4.2V-3V), and the actual current will increase (up to 1.4 times).

[0122] 45% × 1.4 = 63% < 70% (limit capacity loss reduced); Based on the above calculation, with a three-hour wake-up interval and considering redundancy, it can meet at least six months of offline data collection.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A self-powered, ultra-low power consumption marine corrosion-resistant offline data monitoring device, characterized in that, It includes the main control module, power supply module, and functional modules; The functional modules include an acquisition and control module, a protection module, a communication module, and a dual internal and external data storage module; The main control module integrates multiple data interfaces, which are used to generate anti-corrosion data records and control commands, and output corresponding control commands to various modules in the functional modules through the data interfaces, thereby switching the device's working mode. The data interfaces include analog-to-digital conversion interfaces, general ports, and communication interfaces. The power module has a built-in battery and is connected to an external power source. It is used to power the main control module and the functional modules. It is also used to automatically switch between external power supply and battery power supply according to the control command of the main control module. In battery power supply mode, it can independently cut off or restore the power supply of each module in the functional modules other than the main control module, thereby enabling the device to switch between working state and sleep state. The acquisition and control module is connected to the main control module through an analog-to-digital conversion interface and is used to acquire analog signals from the marine corrosion protection system. The protection module is connected to the general port of the main control module and is used to monitor the power supply and operating status of the device, and to perform hardware reset or cut off the relevant power supply according to the safety instructions issued by the main control module. The communication module is connected to the communication interface of the main control module to realize bidirectional communication between the main control module and the host computer. The dual internal and external data storage module is connected to the general-purpose port of the main control module, which includes: An internal storage module, integrated within the main control module, is used for temporary storage of anti-corrosion data records; An external storage module is used to write the corrosion prevention data records into the corresponding storage medium.

2. The self-powered ultra-low power marine corrosion-resistant offline data monitoring device according to claim 1, characterized in that, The power module includes a power detection module, a power control module, a power supply mode switching module, and a voltage conversion module; The input terminal of the power detection module is connected to the output terminal of the power supply battery and the external power interface. It is used to monitor the voltage, battery capacity and health status of the two power supplies in real time, and output the detected analog signal to the main control module. The input terminal of the power control module is used to receive signals from the power detection module and control commands from the main control module, and generate three control signals. The first control signal is used to control the operation of the power supply mode switching module, the second control signal is used to control the enable state of the voltage conversion module, and the third control signal is used to control the power supply mode of the functional module, i.e., switching between working state and sleep state. The power supply switching module has two input terminals, which are respectively connected to the power supply battery and the external power interface, and its output terminal is connected to the power bus. The power supply mode switching module is used to switch between external power supply and battery power supply under manual or control commands from the power control module. The input terminal of the voltage conversion module is connected to the power bus and is used to convert the input voltage into different levels required by each module in the functional module.

3. The self-powered ultra-low power marine corrosion-resistant offline data monitoring device according to claim 2, characterized in that, The voltage conversion module includes a buck converter chip U1; the power supply mode switching module includes a first low-power linear regulator chip U2; and the power detection module includes a second low-power linear regulator chip U3. The input terminal of the step-down converter chip U1 is connected to the power bus to supply power to each module in the functional modules other than the main control module. The enable pin EN of the buck converter chip U1 is connected to the second control signal of the power control module, and the main control module controls the switching of the buck converter chip U1 through the enable pin EN. The input terminals of the first low-power linear regulator chip U2 and the second low-power linear regulator chip U3 are connected to the power bus or a pre-regulated voltage to power the main control module and its peripheral circuits in sleep mode.

4. The self-powered ultra-low power marine corrosion-resistant offline data monitoring device according to claim 3, characterized in that, The voltage conversion module also includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first inductor L1, and a first diode D1. The input pin VIN of the buck converter chip U1 is connected to the output terminal of the power supply mode switching module through a first capacitor C1, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4 connected in parallel. One end of the first resistor R1 is connected to the enable pin EN of the buck converter chip U1, and the other end is grounded; The output pin SW of the buck converter chip U1 is connected to the power input terminal of the subsequent circuit through the first inductor L1, so as to supply power to each module in the functional modules other than the main control module. The feedback pin FB of the buck converter chip U1 is connected to one end of the second resistor R2. The other end of the second resistor R2 is connected to one end of the third resistor R3 and the fifth resistor R5 respectively. The other end of the third resistor R3 is grounded. The other end of the fifth resistor R5 is connected to one end of the fourth resistor R4. The other end of the fourth resistor R4 is connected to the power input terminal of the subsequent circuit. The two ends of the sixth capacitor C6 are connected to the second resistor R2 and the power input terminal of the subsequent circuit respectively. The seventh capacitor C7 and the eighth capacitor C8 are connected in parallel, with one end grounded and the other end connected to the power input terminal of the subsequent circuit. One end of the fifth capacitor C5 is connected to the first pin BOOT of the buck converter chip U1, and the other end is connected to the first inductor L1; one end of the first diode D1 is connected to the first inductor L1, and the other end is grounded.

5. The self-powered ultra-low power marine corrosion-resistant offline data monitoring device according to claim 4, characterized in that, The power supply mode switching module also includes a second diode D2, a third diode D3, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, and a second inductor L2. One end of the second diode D2 is connected to the external power input terminal and the power supply battery input terminal, respectively, and the other end is connected to the second pin VIN and the third pin EN of the first low-power linear regulator chip U2; One end of the ninth capacitor C9 and the tenth capacitor C10 are both connected to the second diode D2, and the other end is grounded. One end of the eleventh capacitor C11 is connected to the first pin BOOT of the first low-power linear regulator chip U2, and the other end is connected to the second inductor L2. One end of the second inductor L2 is connected to one end of the third diode D3, and the other end is connected to the power supply terminal of the battery. One end of the sixth resistor R6 is connected to the fifth pin FB of the first low-power linear regulator chip U2, and the other end is connected to the eighth resistor R8. The other end of the eighth resistor R8 is connected to the seventh resistor R7, and the other end of the seventh resistor R7 is connected to the power supply terminal of the power supply battery. One end of the ninth resistor R9 is connected to the eighth resistor R8, and the other end is grounded; The two ends of the twelfth capacitor C12 are connected to the eighth resistor R8 and the power supply terminal of the battery, respectively.

6. The self-powered ultra-low power marine corrosion-resistant offline data monitoring device according to claim 5, characterized in that, The power detection module also includes a fourth diode D4, a common cathode dual diode D5, a third inductor L3, a thirteenth capacitor C13, a fourteenth capacitor C14, a fifteenth capacitor C15, a sixteenth capacitor C16, a seventeenth capacitor C17, an eighteenth capacitor C18, a nineteenth capacitor C19, a twentieth capacitor C20, a twenty-first capacitor C21, a twenty-second capacitor C22, a twenty-third capacitor C23, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, and a thirteenth resistor R13; The thirteenth capacitor C13, the fourteenth capacitor C14, and the fifteenth capacitor C15 are connected in parallel and connected to the power supply terminal of the power supply battery, the second pin VIN and the third pin EN of the second low-power linear regulator chip U3. One end of the sixteenth capacitor C16 is connected to the first pin BOOT of the second low-power linear regulator chip U3, and the other end is connected to the third inductor L3; One end of the third inductor L3 is connected to one end of the fourth diode D4, and the other end is connected to the eleventh resistor R11; One end of the eleventh resistor R11 is connected to the twelfth resistor R12, the other end of the twelfth resistor R12 is connected to the tenth resistor R10 and the thirteenth resistor R13 respectively, the other end of the tenth resistor R10 is connected to the fifth pin FB of the second low-power linear regulator chip U3, and the other end of the thirteenth resistor R13 is grounded. The two ends of the seventeenth capacitor C17 are respectively connected to the eleventh resistor R11 and the twelfth resistor R12; The eighteenth capacitor C18, the nineteenth capacitor C19, and the twentieth capacitor C20 are connected in parallel, and their two ends are respectively connected to the eleventh resistor R11 and ground. After the 21st capacitor C21, the 22nd capacitor C22, and the 23rd capacitor C23 are connected in parallel, their two ends are connected to a 3.3V external power supply and ground, respectively. The two input terminals of the common cathode dual diode D5 are connected to the eleventh resistor R11 and the power supply battery, respectively, and the output terminal is connected to a 3.3V external power supply.

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