Smart care mat monitoring system and smart care mat

Abstract

This utility model discloses an intelligent nursing pad monitoring system and an intelligent nursing pad. The intelligent nursing pad monitoring system includes a main control module and a data acquisition module. The output terminal of the data acquisition module is electrically connected to the input terminal of the main control module. The data acquisition module is used to collect humidity status data and / or occupancy status data of the nursing pad, and outputs the humidity status signal and / or occupancy status signal of the nursing pad to the main control module. The main control module is used to receive the humidity status signal and / or occupancy status signal, and outputs the humidity status prompt signal and / or occupancy status prompt signal of the nursing pad. Through the above method, the humidity status and / or occupancy status of the nursing pad can be automatically monitored in real time, and corresponding humidity status prompt signals and / or occupancy status prompt signals of the nursing pad can be output, thereby improving the monitoring efficiency of the nursing pad.

Description

Technical Field

[0001] This utility model relates to the field of condition monitoring technology, and in particular to an intelligent nursing pad monitoring system and an intelligent nursing pad. Background Technology

[0002] Nursing pads are suitable for individuals who require prolonged bed rest or special care. They are primarily used in hospital surgeries, gynecological examinations, postpartum care, infant care, and for situations involving incontinence in paralyzed patients. Their design prioritizes large-area protection and absorbency to meet specific care needs.

[0003] In long-term care settings such as aging populations, chronic diseases, and postoperative rehabilitation, issues such as surgical leakage, postpartum lochia, bedwetting in infants, and disability / incontinence frequently arise. Therefore, monitoring the wetness of nursing pads and monitoring patients' exit from the bed are two extremely critical aspects that directly affect the targetedness and effectiveness of nursing care.

[0004] Traditional nursing care relies mainly on manual, periodic checks and experience-based judgment. This model has many drawbacks, as nursing staff find it difficult to monitor each patient's condition in real time and continuously. This can easily lead to situations such as wet nursing pads going unnoticed or patients getting out of bed and having accidents. Utility Model Content

[0005] The main objective of this invention is to provide an intelligent nursing pad monitoring system and an intelligent nursing pad, which can solve the problem of low efficiency in monitoring the status of nursing pads in the prior art.

[0006] To achieve the above objectives, the first aspect of this utility model provides an intelligent nursing pad monitoring system, the intelligent nursing pad monitoring system comprising:

[0007] The main control module and the data acquisition module are provided, wherein the output terminal of the data acquisition module is electrically connected to the input terminal of the main control module.

[0008] The data acquisition module is used to acquire the humidity status data and / or occupancy status data of the nursing pad, and output the humidity status signal and / or occupancy status signal of the nursing pad to the main control module;

[0009] The main control module is used to receive the humidity status signal and / or occupancy status signal, and output the humidity status prompt signal and / or occupancy status prompt signal of the nursing pad.

[0010] In one feasible implementation, the system comprises a power supply module, a communication module, and a status feedback module; the output terminal of the power supply module is electrically connected to the power supply terminal of the main control module and the power supply terminal of the data acquisition module, respectively; the communication module is electrically connected to the communication terminal of the main control module; and the input terminal of the status feedback module is electrically connected to the output terminal of the main control module.

[0011] The power module is used to output the target power supply signal to the main control module and the data acquisition module;

[0012] The main control module is also used to output the humidity status prompt signal and / or the occupancy status prompt signal to the communication module and the status feedback module;

[0013] The status feedback module is used to receive the humidity status prompt signal and / or the occupancy status prompt signal, and output an audible and visual feedback prompt.

[0014] The communication module is used to receive the humidity status prompt signal and / or occupancy status prompt signal, and send them to a preset client. The client has a communication connection with the main control module.

[0015] In one feasible implementation, the power module includes at least a power input protection unit, a power conversion unit, and a low-dropout voltage regulator unit; the output terminal of the power module includes the output terminal of the low-dropout voltage regulator unit; the output terminal of the power input protection unit is electrically connected to the input terminal of the power conversion unit; the output terminal of the power conversion unit is electrically connected to the input terminal of the low-dropout voltage regulator unit; and the output terminal of the low-dropout voltage regulator unit is electrically connected to the power supply terminal of the main control module and the power supply terminal of the data acquisition module, respectively.

[0016] The power input protection unit is used to receive the original power supply signal and output the filtered first power supply signal.

[0017] The power conversion unit is used to receive the first power supply signal and output the converted second power supply signal to the low dropout voltage regulator unit.

[0018] The low-dropout voltage regulator unit is used to receive the second power supply signal and output the regulated target power supply signal to the main control module and the data acquisition module.

[0019] In one feasible implementation, the data acquisition module includes at least a data processing unit, a humidity sensing unit, and an occupancy sensing unit; the output terminal of the data acquisition module is the output terminal of the data processing unit; the input terminal of the data processing unit is electrically connected to the output terminal of the humidity sensing unit and the output terminal of the occupancy sensing unit, respectively.

[0020] The humidity-sensitive sensing unit is used to collect the humidity status data of the nursing pad and output the humidity status data to the data processing unit.

[0021] The occupancy sensing unit is used to collect the occupancy status data of the nursing pad and output the occupancy status data to the data processing unit;

[0022] The data processing unit is used to receive the humidity status data and / or occupancy status data, and output the humidity status signal and / or occupancy status signal of the nursing pad to the main control module.

[0023] In one feasible implementation, the status feedback module includes a first illumination prompt unit, a second illumination prompt unit, and an audio prompt unit; the input terminals of the status feedback module include the input terminals of the first illumination prompt unit, the second illumination prompt unit, and the audio prompt unit; and the output terminals of the main control module include the first output pin, the second output pin, and the third output pin of the main control chip.

[0024] The first illumination prompt unit includes a first resistor, a second resistor, a third resistor, a first LED, and a first switching element; the input terminal of the first illumination unit includes one end of the first resistor.

[0025] One end of the first resistor is electrically connected to the first output pin of the main control chip, and the other end of the first resistor is electrically connected to one end of the second resistor and the gate of the first switching element; the other end of the second resistor is electrically connected to the common ground terminal; the drain of the first switching element is electrically connected to the input terminal of the first LED through the third resistor, and the source of the first switching element is electrically connected to the common ground terminal.

[0026] The second illumination prompt unit includes a fourth resistor, a fifth resistor, a second switching element, a sixth resistor, and a second LED, and the input terminal of the first illumination unit includes one end of the fourth resistor.

[0027] One end of the fourth resistor is electrically connected to the second output pin of the main control chip, and the other end of the fourth resistor is electrically connected to one end of the fifth resistor and the gate of the second switching element; the other end of the fifth resistor is electrically connected to the common ground terminal; the drain of the second switching element is electrically connected to the input terminal of the second LED through the sixth resistor, and the source of the second switching element is electrically connected to the common ground terminal.

[0028] The sound prompt unit includes a seventh resistor, an eighth resistor, a ninth resistor, a buzzer, a third switching element, and a first capacitor. The input terminal of the sound prompt unit includes one end of the seventh resistor.

[0029] One end of the seventh resistor is electrically connected to the third output pin of the main control chip, and the other end of the seventh resistor is electrically connected to one end of the eighth resistor and the gate of the third switching element; the other end of the eighth resistor is electrically connected to the common ground terminal, and the source of the third switching element is electrically connected to the common ground terminal; one end of the ninth resistor is electrically connected to the first power supply voltage terminal, and the other end of the ninth resistor is electrically connected to the positive terminal of the buzzer; the negative terminal of the buzzer is electrically connected to the drain of the third switching element; one end of the first capacitor is electrically connected to the first power supply voltage terminal, and the other end of the first capacitor is electrically connected to the common ground terminal.

[0030] In one feasible implementation, the data processing unit includes at least a data processing chip, and the input terminal of the data processing unit includes at least a first input pin and a second input pin of the data processing chip; the output terminal of the data processing unit includes at least a first serial communication pin and a second serial communication pin of the data processing chip; the input terminal of the main control module includes a first serial communication pin and a second serial communication pin of the main control chip.

[0031] The first input pin of the data processing chip is connected to the output terminal of the humidity sensing unit; the second input pin of the data processing chip is connected to the output terminal of the occupancy sensing unit; the first serial communication pin of the data processing chip is electrically connected to the first serial communication pin of the main control chip; and the second serial communication pin of the data processing chip is electrically connected to the second serial communication pin of the main control chip.

[0032] In one feasible implementation, the power input protection unit includes a power supply, a power voltage interface, a power ground interface, a common mode inductor, a second capacitor, a third capacitor, a transient voltage suppression diode, a diode, and a fuse, and the output terminal of the power input protection unit includes one end of the fuse;

[0033] The power supply is electrically connected to the power voltage interface; the power ground interface is electrically connected to the digital ground terminal; the first pin of the common mode inductor is electrically connected to the power supply and one end of the second capacitor; the second pin of the common mode inductor is electrically connected to the second power voltage terminal and one end of the third capacitor; the third pin of the common mode inductor is electrically connected to the other end of the third capacitor; the fourth pin of the common mode inductor is electrically connected to the other end of the second capacitor; the other end of the second capacitor is electrically connected to the digital ground terminal; and the other end of the third capacitor is electrically connected to the power ground terminal.

[0034] One end of the transient voltage suppression diode is electrically connected to the second power supply voltage terminal, and the other end of the transient voltage suppression diode is electrically connected to the power ground terminal; one end of the fuse is electrically connected to the input terminal of the power conversion unit; the cathode of the diode is electrically connected to the other end of the fuse; and the anode of the diode is electrically connected to the second power supply voltage terminal.

[0035] In one feasible implementation, the power conversion unit includes: a DC-DC converter, a tenth resistor, an eleventh resistor, a twelfth resistor, an inductor, and a freewheeling diode; the input terminal of the power conversion unit is one end of the tenth resistor; the output terminal of the power conversion unit is one end of the inductor; and one end of the inductor is electrically connected to the input terminal of the low-dropout voltage regulator unit.

[0036] One end of the tenth resistor is electrically connected to one end of the fuse; the other end of the tenth resistor is electrically connected to the enable pin of the DC-DC converter; the switch pin of the DC-DC converter is electrically connected to the other end of the inductor and the cathode of the freewheeling diode, respectively; the anode of the freewheeling diode is electrically connected to the common ground terminal; the feedback pin of the DC-DC converter is electrically connected to one end of the eleventh resistor and one end of the twelfth resistor, respectively; the other end of the eleventh resistor is electrically connected to one end of the inductor; and the other end of the twelfth resistor is electrically connected to the common ground terminal.

[0037] In one feasible implementation, the low-dropout voltage regulator unit includes: a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, and a fuse resistor; the input terminal of the low-dropout voltage regulator unit includes one end of the fourth capacitor; the output terminal of the low-dropout voltage regulator unit includes a first power supply voltage terminal; the first power supply voltage terminal is electrically connected to the power supply terminal of the main control module and the power supply terminal of the data acquisition module respectively; one end of the fourth capacitor is electrically connected to one end of an inductor.

[0038] One end of the fourth capacitor is also electrically connected to one end of the fifth capacitor; the other end of the fourth capacitor is electrically connected to one end of the twelfth resistor; one end of the fifth capacitor is also electrically connected to one end of the sixth capacitor; one end of the sixth capacitor is also electrically connected to the other end of the fuse resistor; the other end of the fuse resistor is electrically connected to one end of the seventh capacitor; the other ends of the fifth, sixth, and seventh capacitors are electrically connected to the common ground terminal; and one end of the fuse resistor is also electrically connected to the first power supply voltage terminal.

[0039] To achieve the above objectives, a second aspect of this utility model provides an intelligent nursing pad, the intelligent nursing pad comprising the pad body and an intelligent nursing pad monitoring system as shown in the first aspect and any feasible implementation.

[0040] The present invention has the following beneficial effects:

[0041] This invention provides an intelligent nursing pad monitoring system, comprising: a main control module and a data acquisition module. The output terminal of the data acquisition module is electrically connected to the input terminal of the main control module. The data acquisition module is used to collect humidity status data and / or occupancy status data of the nursing pad, and outputs humidity status signals and / or occupancy status signals of the nursing pad to the main control module. The main control module is used to receive humidity status signals and / or occupancy status signals, and outputs humidity status prompt signals and / or occupancy status prompt signals of the nursing pad. Through the above method, the humidity status and / or occupancy status of the nursing pad can be automatically monitored in real time, and corresponding humidity status prompt signals and / or occupancy status prompt signals can be output, improving the monitoring efficiency of the nursing pad. Attached Figure Description

[0042] 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] in:

[0044] Figure 1 This is a structural block diagram of an intelligent nursing pad monitoring system according to an embodiment of the present invention;

[0045] Figure 2 This is another structural block diagram of an intelligent nursing pad monitoring system according to an embodiment of the present utility model;

[0046] Figures 3 to 12 This is a partial circuit diagram of an intelligent nursing pad monitoring system according to an embodiment of the present invention. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0048] Please see Figure 1 , Figure 1 This is a structural block diagram of an intelligent nursing pad monitoring system according to an embodiment of the present invention, as shown below. Figure 1 The intelligent nursing pad monitoring system includes a main control module 10 and a data acquisition module 20, wherein the output terminal of the data acquisition module 20 is electrically connected to the input terminal of the main control module 10.

[0049] The data acquisition module collects humidity and / or occupancy data of the nursing pad and outputs these signals to the main control module. The nursing pad can be the one being monitored. The data acquisition module is in contact with the pad; it can be positioned on top of the pad or overlapped with it, allowing it to synchronously sense changes in the pad's condition. Specifically, the data acquisition module collects humidity and / or occupancy data. Humidity data reflects the pad's moisture level, such as whether the user has wet the pad. Occupancy data reflects the pad's occupancy status, such as whether the user is on the pad or not, and can monitor whether the user has moved away from the pad to prevent accidents such as falling off the bed. The collected data is then converted into electronic signals and sent to the main control module for status determination. For example, the data acquisition module can consist of a contact sensor and a touch IC. The contact sensor monitors humidity and occupancy data, while the touch IC processes this data. The touch IC, as the sensor control core, manages sensor data acquisition and preliminary processing. The touch IC is powered and grounded via a power supply module connected to VCC and grounded to GND. The contact sensor may include a moisture sensor pad and an occupancy sensor pad. The moisture sensor pad detects the moisture of the nursing pad (e.g., wetness from urine) and inputs a signal to the touch IC via the moisture sensor port. The occupancy sensor pad detects the occupancy status of the person (e.g., getting out of bed) and inputs a signal to the touch IC via the occupancy sensor port.

[0050] Touch IC Data Output: The processed sensor data is transmitted to the main control module (MCU) through the Signal Output port to provide a basis for system judgment.

[0051] Furthermore, the main control module receives the humidity status signal and / or occupancy status signal, and outputs the humidity status indication signal and / or occupancy status indication signal of the nursing pad. The humidity status indication signal indicates the humidity status of the nursing pad, such as whether the pad is wet with urine. The occupancy status indication signal indicates the occupancy status of the nursing pad, such as whether the pad is occupied or continuously occupied. This achieves real-time monitoring of the nursing pad and improves monitoring efficiency. For example, the core function of the main control module (MCU) is as the system processing center, undertaking data processing and logic control functions. Its interaction is as follows: it receives sensor data processed by the Touch IC through the Signal Detection Input to determine the status of the nursing pad (e.g., wet with urine, human escape). It outputs control signals to drive peripherals such as indicator lights and buzzers to achieve status feedback (e.g., wet light illuminates, human escape alarm).

[0052] This invention provides an intelligent nursing pad monitoring system, comprising: a main control module and a data acquisition module. The output terminal of the data acquisition module is electrically connected to the input terminal of the main control module. The data acquisition module is used to collect humidity status data and / or occupancy status data of the nursing pad, and outputs humidity status signals and / or occupancy status signals of the nursing pad to the main control module. The main control module is used to receive humidity status signals and / or occupancy status signals, and outputs humidity status prompt signals and / or occupancy status prompt signals of the nursing pad. Through the above method, the humidity status and / or occupancy status of the nursing pad can be automatically monitored in real time, and corresponding humidity status prompt signals and / or occupancy status prompt signals can be output, improving the monitoring efficiency of the nursing pad.

[0053] Please see Figure 2 , Figure 2 This is another structural block diagram of an intelligent nursing pad monitoring system according to an embodiment of the present invention, as shown below. Figure 2 The intelligent nursing pad monitoring system shown includes: a main control module 10 and a data acquisition module 20, a power supply module 30, a communication module 40 and a status feedback module 50;

[0054] The output terminal of the data acquisition module 20 is electrically connected to the input terminal of the main control module 10; the output terminal of the power supply module 30 is electrically connected to both the power supply terminal of the main control module 10 and the power supply terminal of the data acquisition module 20; the communication module 40 is electrically connected to the communication terminal of the main control module 10; and the input terminal of the status feedback module 50 is electrically connected to the output terminal of the main control module 10.

[0055] The data acquisition module 20 is used to acquire the humidity status data and / or occupancy status data of the nursing pad, and output the humidity status signal and / or occupancy status signal of the nursing pad to the main control module 10.

[0056] The main control module 10 is used to receive the humidity status signal and / or occupancy status signal, and output the humidity status prompt signal and / or occupancy status prompt signal of the nursing pad;

[0057] It should be noted that, Figure 2 The main control module 10 and data acquisition module 20 shown are... Figure 1 The main control module 10 and data acquisition module 20 shown are similar in content, and will not be described in detail here to avoid repetition. Please refer to [link / reference needed] for more information. Figure 1 The contents of the main control module 10 and the data acquisition module 20 shown.

[0058] The power module 30 is used to output the target power supply signal to the main control module 10 and the data acquisition module 20. That is, the power module 30 supplies power to the other modules. The status feedback module 50 and the communication module 40 are indirectly connected to the power module 30 through the main control module 10. Therefore, the power module also supplies power to the status feedback module 50 and the communication module 40.

[0059] Furthermore, the main control module 10 is also used to output the humidity status prompt signal and / or occupancy status prompt signal to the communication module 40 and the status feedback module 50.

[0060] Understandably, the main control module (MCU) performs the following functions: data processing and logic judgment, peripheral control, communication management, and system coordination and management, specifically as follows: 1. Data processing and logic judgment: The MCU receives sensor data transmitted from the data acquisition module (TouchIC) and performs in-depth processing and analysis on this data. It determines, based on preset logic and algorithms, whether the nursing pad is wet, whether the patient has left the bed, etc.; 2. Peripheral control: Indicator light control: When the MCU determines that the nursing pad is wet, it outputs a control signal through the corresponding pin (such as SW1) to drive the indicator light circuit, causing the indicator light to illuminate, thus visually reminding the nursing staff that the nursing pad needs to be replaced. And buzzer control: When a patient leaves the bed (human escape) signal is detected, the MCU will output a high level through the BUZZER pin to activate the buzzer driver circuit, making the buzzer emit a loud sound to attract the attention of medical staff or family members; 3. Communication management: The main control module (MCU) is also responsible for interacting with the communication module, receiving external instructions from the communication interface, and sending the system status information to the external control box or terminal product through the communication module to realize data interaction and remote control between the system and external devices; 4. System coordination and management: As the core of the entire intelligent nursing pad monitoring system, the MCU coordinates the work between various modules, ensuring stable power supply to the power module, normal data acquisition by the sensor module, smooth communication by the communication module, and timely and accurate response of peripherals to various status changes, ensuring the stable operation and efficient work of the entire system.

[0061] The status feedback module 50 is used to receive the humidity status prompt signal and / or occupancy status prompt signal, and output audio-visual feedback prompts. The status feedback module is used to output status prompts for the nursing pad, such as audio-visual feedback prompts, providing dual prompts through hearing and vision. For example, the status feedback module 50 includes a first light prompt unit 51, a second light prompt unit 52, and a sound prompt unit 53. The first light prompt unit 51 includes a first LED (SLED1), the second light prompt unit 52 includes a second LED (SLED2), and the sound prompt unit 53 includes a buzzer. The prompting principle of the status feedback module is as follows: through the logic control of the main control MCU, SLED1 is triggered to light up when the pad is wet, and the buzzer is driven to sound and SLED2 is lit when the person escapes, forming a dual reminder of "visual + auditory", ensuring that medical staff or family members pay attention to abnormal status in time, and improving nursing efficiency and response timeliness.

[0062] The communication module 40 is used to receive the humidity status prompt signal and / or occupancy status prompt signal, and send them to a preset client. The client has a communication connection with the main control module 10. That is, this application also presets a client, which users can download and use on a terminal to receive interactive information and check the status of the nursing pad in real time. For example, the communication module consists of a communication interface with multiple communication modes and a communication mode switching module. The functions of the communication module are: 1) Communication interface: supports at least three communication modes such as RS485 communication, RV / TXC communication, and high / low level communication, for connecting to external control boxes or terminal products to realize data interaction and command transmission. 2) Communication Mode: performs mode processing on communication signals to ensure that signals of different communication protocols are correctly identified and processed by the MCU.

[0063] For example, the overall system interaction logic is as follows: power supply → data acquisition → processing and control → communication interaction, as detailed below:

[0064] Power supply: The external power supply is converted and regulated by the power module to supply power to modules such as MCU and Touch IC.

[0065] Data acquisition: The humidity / occupancy sensor pad collects signals, which are then processed by the Touch IC and transmitted to the MCU.

[0066] Data processing and control: The MCU analyzes sensor data, outputs control signals (such as driving indicator lights and buzzers), and simultaneously feeds back the system status to external devices through the communication module.

[0067] Functional closed loop: The system realizes nursing pad status monitoring, abnormal alarm and external linkage through the process of "power supply → data acquisition → processing control → communication interaction", which is suitable for intelligent nursing scenarios.

[0068] In one feasible implementation, for more stable power supply, the power module 30 includes at least a power input protection unit 31, a power conversion unit 32, and a low-dropout voltage regulator unit 33; wherein, the output terminal of the power module 30 includes the output terminal of the low-dropout voltage regulator unit; the output terminal of the power input protection unit is electrically connected to the input terminal of the power conversion unit; the output terminal of the power conversion unit is electrically connected to the input terminal of the low-dropout voltage regulator unit; and the output terminal of the low-dropout voltage regulator unit is electrically connected to the power supply terminal of the main control module 10 and the power supply terminal of the data acquisition module 20, respectively.

[0069] The power input protection unit 31 is used to receive the original power supply signal and output the filtered first power supply signal; the power conversion unit 32 is used to receive the first power supply signal and output the converted second power supply signal to the low dropout voltage regulator unit; the low dropout voltage regulator unit 33 is used to receive the second power supply signal and output the regulated target power supply signal to the main control module 10 and the data acquisition module 20.

[0070] For example, a power module may consist of a power interface, a DC-DC converter circuit, and a low-dropout regulator (LDO). Function: An external power source is connected via power interfaces ① (power input) and ② (GND ground). The power is first converted to voltage by the DC-DC circuit, and then regulated by the LDO to provide stable power to modules such as the main control module (MCU) and data acquisition module (Touch IC) within the system.

[0071] In one feasible implementation, the data acquisition module 20 includes at least a data processing unit, a humidity sensing unit, and an occupancy sensing unit; the output terminal of the data acquisition module 20 is the output terminal of the data processing unit; the input terminal of the data processing unit is electrically connected to the output terminal of the humidity sensing unit and the output terminal of the occupancy sensing unit, respectively.

[0072] The humidity-sensitive sensing unit is used to collect humidity status data of the nursing pad and output the humidity status data to the data processing unit; for example, the humidity-sensitive sensing unit includes a humidity sensor, which can be disposed on the nursing pad to form a humidity-sensitive sensing pad.

[0073] The occupancy sensing unit is used to collect occupancy status data of the nursing pad and output the occupancy status data to the data processing unit; for example, the occupancy sensing unit includes an occupancy sensor, which can be set on the nursing pad to form an occupancy sensing pad.

[0074] The data processing unit is used to receive the humidity status data and / or occupancy status data, and output the humidity status signal and / or occupancy status signal of the nursing pad to the main control module 10.

[0075] Please see Figures 3 to 12 , Figures 3 to 12 This is a circuit diagram of an intelligent nursing pad monitoring system according to an embodiment of the present invention. The circuit principle and connection relationship are described in detail below:

[0076] like Figures 3 to 5 The circuit schematic of the power module 30 shown includes at least a power input protection unit 31, a power conversion unit 32, and a low dropout voltage regulator unit 33. The circuit converts the 29V power supply to a stable +5V through a three-stage design of input protection, DC-DC conversion, and output filtering, providing a reliable power supply for the back-end circuits (such as the main control chip and sensors).

[0077] Among them, such as Figure 3 The circuit diagram of the power input protection unit 31 shown includes a +25V power supply, a power voltage interface VCC Faston Plug 1, a power ground interface GND Faston Plug 1, a common mode inductor L2, a second capacitor C14, a third capacitor C15, a transient voltage suppression diode TVS1, a first diode D1, and a fuse F1. The output terminal of the power input protection unit includes one end of the fuse F1.

[0078] The power supply 29V_IN is electrically connected to the power voltage interface VCC Faston Plug 1; the power ground interface GND Faston Plug 1 is electrically connected to the digital ground terminal; the first pin of the common mode inductor L2 is electrically connected to the power supply 29IN and one end of capacitor C14; the second pin of the common mode inductor L2 is electrically connected to the second power voltage terminal +29V and one end of capacitor C15; the third pin of the common mode inductor L2 is electrically connected to the other end of capacitor C15; the fourth pin of the common mode inductor L2 is electrically connected to the other end of capacitor C14; the other end of capacitor C14 is electrically connected to the digital ground terminal DGND; the other end of capacitor C15 is electrically connected to the power ground terminal PGND.

[0079] One end of the transient voltage suppression diode TVS1 is electrically connected to the second power supply voltage terminal +29V, and the other end of the transient voltage suppression diode TVS1 is electrically connected to the power ground terminal PGND; one end of the fuse F1 is electrically connected to the input terminal of the power conversion unit; the cathode of the first diode D1 is electrically connected to the other end of the fuse F1; and the anode of the first diode D1 is electrically connected to the second power supply voltage terminal +29V.

[0080] It should be noted that the input interface of the power input protection module is: 29V_IN, which inputs 29V power through the “VCC Faston Plug 1” interface, and grounded with “GND Faston Plug 1” to ensure power connection;

[0081] Surge and overcurrent protection includes TVS1, D1, and F1. TVS1 (P6SMB36CA): Transient voltage suppressor diode, clamping voltage 36V, absorbs input-side surge voltage, protecting downstream circuitry. D1 (ES1DL): Rectifier diode, prevents reverse power connection damage to the circuit. F1 (63V1AFast): Fuse, blows in case of overcurrent, blocking abnormal current.

[0082] The filter circuit consists of L2, C14, and C15 forming a π-type filter network. L2 is a common-mode inductor that suppresses common-mode interference. C14 and C15 (1nF / 100V) filter out high-frequency noise.

[0083] In one feasible implementation, such as Figure 4 The circuit diagram of the power conversion unit 32 shown includes: a DC-DC converter U1, a tenth resistor R1, an eleventh resistor R3, a twelfth resistor R4, an inductor L1, and a freewheeling diode D3; the input terminal of the power conversion unit is one end of the resistor R1; the output terminal of the power conversion unit is one end of the inductor L1; one end of the inductor L1 is electrically connected to the input terminal of the low dropout voltage regulator unit.

[0084] One end of resistor R1 is electrically connected to one end of fuse F1; the other end of resistor R1 is electrically connected to the enable pin EN of the DC-DC converter; the switch pin SW of the DC-DC converter is electrically connected to the other end of inductor L1 and the cathode of freewheeling diode D3; the anode of freewheeling diode D3 is electrically connected to the common ground terminal; the feedback pin FB of the DC-DC converter is electrically connected to one end of resistor R3 and one end of resistor R4; the other end of resistor R3 is electrically connected to one end of inductor L1; the other end of resistor R4 is electrically connected to the common ground terminal.

[0085] It should be noted that the power conversion unit is a DC-DC step-down converter module. The core chip U1 (ME3116AM6G) is a step-down DC-DC converter with an input voltage range of 4.75-40V, a fixed output of 5V, and a maximum current of 1A.

[0086] Pin functions: Enable pin EN: Pulled up to the input power supply through R1 to activate the chip; Switch pin SW: Connected to inductor L1 to realize high-frequency switching; Feedback pin FB: Sets the output voltage through the voltage divider resistors R3 and R4.

[0087] The external circuitry includes an energy storage inductor L1 and a freewheeling diode D3. L1: Energy storage inductor, working in conjunction with the internal switching transistor to achieve energy conversion. D3 (SS34): Freewheeling diode, providing a freewheeling path for the inductor when the internal switching transistor is off, ensuring continuous current.

[0088] In one feasible implementation, such as Figure 5 The circuit diagram of the low-dropout voltage regulator unit 33 shown includes: a fourth capacitor C5, a fifth capacitor C6, a sixth capacitor C7, a seventh capacitor C8, and a fuse resistor FB1; the input terminal of the low-dropout voltage regulator unit includes one end of capacitor C5; the output terminal of the low-dropout voltage regulator unit includes a first power supply voltage terminal +5V; the first power supply voltage terminal is electrically connected to the power supply terminal of the main control module and the power supply terminal of the data acquisition module respectively; one end of capacitor C5 is electrically connected to one end of inductor L1;

[0089] One end of capacitor C5 is also electrically connected to one end of capacitor C6; the other end of capacitor C5 is electrically connected to one end of resistor R4; one end of capacitor C6 is also electrically connected to one end of capacitor C7; one end of capacitor C7 is also electrically connected to the other end of fuse resistor FB1; the other end of fuse resistor FB1 is electrically connected to one end of capacitor C8; the other ends of capacitors C6, C7, and C8 are electrically connected to a common ground terminal; one end of fuse resistor FB1 is also electrically connected to the first power supply voltage terminal +5V.

[0090] It should be noted that the low dropout voltage regulator unit is an LDO voltage regulator unit. This low dropout voltage regulator unit serves as an output filtering and voltage regulation module, including a capacitor array C5-C8 and a fuse resistor FB1. Among them, C5 is a large-capacity electrolytic capacitor that filters out low-frequency ripple; C6, C7, and C8 work together to filter out high-frequency noise and ensure a stable and clean +5V output; FB1 is a fuse resistor that prevents damage to the preceding circuitry in the event of an output short circuit.

[0091] like Figure 6 The circuit diagram of the data processing unit shown includes at least a data processing chip IC1. The input terminals of the data processing unit include at least a first input pin TK1 and a second input pin TK2 of the data processing chip IC1. The output terminals of the data processing unit include at least a first serial communication pin TXOUT1 and a second serial communication pin RXOUT2 of the data processing chip IC1. The input terminals of the main control module include the first serial communication pin TX and the second serial communication pin RX of the main control chip.

[0092] The first input pin TK1 of the data processing chip IC1 is connected to the output terminal touch1 of the humidity sensing unit; the second input pin TK2 of the data processing chip IC1 is connected to the output terminal touch2 of the occupancy sensing unit; the first serial communication pin TXOUT1 of the data processing chip IC1 is electrically connected to the first serial communication pin TX of the main control chip; and the second serial communication pin RXOUT2 of the data processing chip IC1 is electrically connected to the second serial communication pin RX of the main control chip.

[0093] It should be noted that the data processing chip IC1 serves as the Touch IC for the following purposes:

[0094] 1. Sensor Signal Acquisition: The Touch IC serves as the core of the sensor control system, connecting the moisture sensor pad and the occupancy sensor pad. It can acquire signals from these two types of sensors in real time. The moisture sensor pad detects the humidity of the nursing pad, such as whether it is wetted with urine; the occupancy sensor pad detects whether the patient is on the nursing pad, i.e., whether they have left the bed.

[0095] 2. Preliminary signal processing: The Touch IC performs preliminary processing on the raw sensor signals it acquires, such as filtering and amplifying the signals, to improve the signal quality and stability, making them more suitable for subsequent analysis and judgment.

[0096] 3. Data transmission: The processed sensor data is transmitted to the main control module (MCU) via "Signal Output" to provide accurate data basis for the main control module's decision-making.

[0097] Furthermore, the Touch IC circuit can be disassembled into a power conversion module, a data processing chip IC1 module (SC92L8533X28U), a sensor interface module, an LED indicator module, and a debugging interface module (J3), etc. The functions and principles of each module are as follows:

[0098] 1) Power conversion module

[0099] Core component: Power chip U1 (MD7350H).

[0100] Function: Converts the input VDC voltage to a stable +5V to power subsequent circuits.

[0101] Auxiliary components:

[0102] Input filtering: C12 (1μF / 50V), C13 (1μF / 50V), and C14 (100nF / 50V) filter out high-frequency noise from the input power supply to ensure a clean input voltage.

[0103] Output filtering: C3 (10μF / 16V), C4 (100nF / 50V), and C5 (10nF / 50V) stabilize the output voltage, suppress ripple, and ensure the stability of the +5V power supply.

[0104] Fuse protection: FB1 (600R 1A) is connected in series in the power path to prevent overcurrent damage to the circuit.

[0105] 2) Data processing chip IC1 module (SC92L8533X28U)

[0106] Core functions: As the circuit control center, it processes sensor signals, drives peripherals, and executes system logic.

[0107] Key pins:

[0108] Power supply pins: VDD (pin 1) is connected to +5V, and GND (pin 3) is grounded to complete the power supply.

[0109] Reset pin: RST (pin 6) performs the reset function through C10 (47nF / 50V) to ensure that the chip is initialized normally.

[0110] Debug pins: tCLK (pin 7) and tDIO (pin 8) are used for program burning and debugging.

[0111] Sensor signal pins: TK series pins (such as TK0-P0.0, TK1-P0.1, etc.) are connected to the Wet Sensor Pad and Occupancy Sensor Pad to collect signals.

[0112] Peripheral control pins: LED1 (pin 16), LED2 (pin 15) control indicator lights;

[0113] TX OUT1 (pin 19) and RX OUT2 (pin 18) are used for serial communication.

[0114] 3) Sensor Interface Module

[0115] Interface components:

[0116] J1 interface: Connects Touch1 and Touch2 signals, and receives detection signals from the Wet Sensor Pad and Occupancy Sensor Pad.

[0117] J2 interface: Includes RX OUT2 and TX OUT1, used for serial communication to transmit processed sensor data to the main control module (MCU).

[0118] Signal processing circuit:

[0119] ESD protection: ESD1 and ESD2 (BTR5232A1) are connected in parallel between Touch1 and Touch2 signals and ground to release static electricity and protect the chip from electrostatic damage.

[0120] Filtering and current limiting: C1 and C2 (1nF / 50V) filter out high-frequency interference from the sensor signal; R1 and R2 (510R) limit the current and protect the IC1 pin.

[0121] 4) LED indicator module

[0122] Circuit composition:

[0123] LED1: Connect to the LED1 pin (pin 16) of IC1 via R3 (2kΩ).

[0124] LED2: Connect to the LED2 pin (pin 15) of IC1 via R4 (2kΩ).

[0125] Function: Based on the processing result of IC1, illuminate the LED to provide feedback on the status. For example, when the sensor is abnormally triggered, IC1 controls the corresponding pin to output a high level, and the current is limited by R3 / R4 to illuminate the LED, providing a visual indication.

[0126] 5) Debugging Interface Module (J3)

[0127] Interface definition:

[0128] It includes pins such as tCLK, tDIO, and RST, which are connected to the corresponding debug pins of IC1.

[0129] Functions: Supports chip programming, fault diagnosis, and function debugging. During development or maintenance, debugging signals are input via the J3 interface to ensure the normal logic function of IC1, facilitating system iteration and optimization.

[0130] like Figure 7 The diagram shows a moisture sensor pad, which can be designed as a moisture sensor pad. The specific mechanism is as follows:

[0131] 1) Physical structure: The Wet Sensor Pad has two independent metal sensing wires built in. Under normal conditions (no liquid), the metal wires are not conductive.

[0132] 2) Liquid conduction: When liquid (such as urine) wets the sensor diaper, the liquid acts as a conductive medium, connecting the two metal sensing wires and forming a closed circuit from the originally disconnected circuit.

[0133] 3) Signal Output: After the line is connected, a current signal is generated and transmitted to the back-end circuit (such as a Touch IC) to trigger signal detection. The MCU analyzes this electrical signal to determine whether a liquid immersion event has occurred, thereby realizing the monitoring of the humidity-sensitive state (such as alarms and status feedback).

[0134] like Figure 8 The diagram shows an occupancy sensor pad, which can be designed as an occupancy sensor pad. The specific mechanism is as follows:

[0135] 1) Works based on the principle of capacitive induction:

[0136] Initial state of capacitance: The sensor pad has built-in capacitive electrodes. When no human body is detected, the electrodes have an inherent capacitance value.

[0137] Human intervention alters capacitance: When a human body approaches an electrode, the body, acting as a conductor, forms an "induced capacitance" with the electrode and the ground. The presence of the human body changes the electric field distribution around the electrode, causing a change in the total capacitance of the electrode.

[0138] 2) Signal Detection and Judgment: The back-end circuit (such as Touch IC) monitors the capacitance change in real time and converts the capacitance value into an electrical signal. When the signal change reaches a set threshold, the MCU determines whether a person is sitting down, thus realizing occupancy detection.

[0139] In actual use, the Wet Sensor Pad is stacked on top of the Occupancy Sensor Pad, and the Wet Sensor Pad and the Occupancy Sensor Pad operate independently.

[0140] like Figure 9 The circuit diagram of the main control module shown is based on the main control chip IC1 (SC92L8533X28U) to realize power management, signal processing and peripheral control. The specific design is as follows:

[0141] 1) Power supply and filtering of the main control chip:

[0142] Power Input: The chip's VDD pin (pin 1) is connected to a +5V power supply. A filter circuit composed of C20 (10μF / 16V), C21 (100nF / 50V), and C22 (10nF / 50V) filters out high-frequency and low-frequency noise from the power supply, ensuring stable power supply. Grounding and Auxiliary Filtering: The GND pin (pin 3) is grounded, and C24 (47nF / 50V) further suppresses power supply interference.

[0143] 2) The main functional pins of the main control chip are as follows:

[0144] 2.1) Detection interface: The chip integrates a large number of detection pins (such as TK0 / P0.0, TK1 / P0.1...TK15 / P2.7) for connecting external sensors (such as Wet Sensor Pad and Occupancy Sensor Pad) to realize signal acquisition.

[0145] 2.2) Communication control pins: RX (pin 19), TX (pin 20): support serial communication and are used for data transmission and reception.

[0146] 2.3) RE / DE (pin 18): Enables the RS485 transceiver to achieve half-duplex communication.

[0147] 2.4) Peripheral control pins:

[0148] BUZZER (pin 27): Drives the buzzer and outputs an alarm signal.

[0149] 5VDCON (pin 21): Enables the external 5V power supply and implements the power switch logic.

[0150] S1 (pin 17), S2 (pin 16), SW1 (pin 15), SW2 (pin 28): Connect to external buttons or switches to obtain input signals.

[0151] 2.5) Extension and debugging interfaces:

[0152] tCLK (pin 7) and tDIO (pin 8): Used for chip debugging or programming, and for connecting external debugging devices.

[0153] U_SDA (pin 9) and U_SCL (pin 10): I2C communication interfaces, which can be connected to external storage chips (such as EEPROM) or sensors.

[0154] RST (pin 6): Reset pin, connected to an external reset circuit to ensure chip initialization.

[0155] 3) Protection circuit of the main control chip:

[0156] Fuse resistors: FB2, FB3, FB6, and FB7 (600R 1A) are connected in series in the signal paths of TX_IN2, RX_IN1, IO_OUT1, and IO_OUT2 respectively to prevent overcurrent damage to the chip pins.

[0157] like Figures 10 to 12The status feedback module 50 shown includes a first illumination prompt unit 51, a second illumination prompt unit 52, and an audio prompt unit 53. The input terminals of the status feedback module 50 include the input terminals of the first illumination prompt unit, the second illumination prompt unit, and the audio prompt unit. The output terminals of the main control module include the first output pin SW1, the second output pin SW2, and the third output pin BUZZER of the main control chip.

[0158] Among them, such as Figure 10 The circuit diagram of the first illumination prompt unit shown includes a first resistor R16, a second resistor R19, a third resistor R24, a first LED, and a first switching element Q2; the input terminal of the first illumination unit includes one end of the first resistor R16; wherein, the switching element can be a MOSFET.

[0159] Wherein, one end of the first resistor is electrically connected to the first output pin of the main control chip, and the other end of the first resistor is electrically connected to one end of the second resistor and the gate of the first switching element; the other end of the second resistor is electrically connected to the common ground terminal; the drain of the first switching element is electrically connected to the input terminal of the first LED through the third resistor, and the source of the first switching element is electrically connected to the common ground terminal; wherein, the LED input terminal can be the negative terminal of the LED.

[0160] Among them, such as Figure 11 The circuit diagram of the second illumination prompt unit shown includes a fourth resistor, a fifth resistor, a second switching element, a sixth resistor, and a second LED. The input terminal of the first illumination unit includes one end of the fourth resistor.

[0161] One end of the fourth resistor is electrically connected to the second output pin of the main control chip, and the other end of the fourth resistor is electrically connected to one end of the fifth resistor and the gate of the second switching element; the other end of the fifth resistor is electrically connected to the common ground terminal; the drain of the second switching element is electrically connected to the input terminal of the second LED through the sixth resistor, and the source of the second switching element is electrically connected to the common ground terminal.

[0162] Among them, such as Figure 12 The circuit diagram of the sound prompt unit shown includes a seventh resistor R18, an eighth resistor R21, a ninth resistor R15, a buzzer Bz1, a third switching element Q1, and a first capacitor C26. The input terminal of the sound prompt unit includes one end of the seventh resistor R18.

[0163] One end of the seventh resistor is electrically connected to the third output pin of the main control chip, and the other end of the seventh resistor is electrically connected to one end of the eighth resistor and the gate of the third switching element; the other end of the eighth resistor is electrically connected to the common ground terminal, and the source of the third switching element is electrically connected to the common ground terminal; one end of the ninth resistor is electrically connected to the first power supply voltage terminal, and the other end of the ninth resistor is electrically connected to the positive terminal of the buzzer; the negative terminal of the buzzer is electrically connected to the drain of the third switching element; one end of the first capacitor is electrically connected to the first power supply voltage terminal, and the other end of the first capacitor is electrically connected to the common ground terminal.

[0164] It should be noted that the circuit composition and driving logic are as follows:

[0165] 1) First illumination prompt unit (SLED1 circuit): It consists of SLED1, R24 (10kΩ), Q2 (WMQ20N06TS), R16 (1kΩ), and R19 (10kΩ).

[0166] When the wetness signal is triggered, the main control MCU outputs a high level SW1, which drives the gate of Q2 after being current-limited by R16, turning Q2 on. The current is then limited by R24 to light up SLED1, realizing the wetness light feedback.

[0167] 2) Second illumination prompt unit (SLED2 circuit): It consists of SLED2, R25 (10kΩ), Q3 (WMQ20N06TS), R17 (1kΩ), and R20 (10kΩ).

[0168] When the human escape signal is triggered, the main control MCU outputs a high level SW2, which drives Q3 to conduct through the current limiter R17. The current is then limited by R25 to light up SLED2, providing a dual prompt in conjunction with sound.

[0169] For power protection and stability design: R24 and R25 are set to limit LED current and prevent overcurrent damage. R19 and R20 are set as pull-down resistors to ensure that the MOSFET gate is at a low level when there is no signal, thus avoiding false triggering.

[0170] 3) Sound prompt unit, i.e. buzzer circuit (which can emit sound when a person escapes): It consists of buzzer Bz1, Q1 (WMQ20N06TS), R18 (1kΩ), R21 (10kΩ), C26 (47μF), etc.

[0171] When the human escape signal is triggered, the main control MCU outputs a high level BUZZER, which drives the gate of Q1 through current limiting R18, turning Q1 on. The +5V power supply powers the buzzer through Q1, and Bz1 emits a loud sound to realize the alarm.

[0172] In order to make the circuit more stable, C26 is used as a filter capacitor to stabilize the 5V power supply and ensure the stable operation of the buzzer; R21 is used as a pull-down resistor to keep the gate of Q1 low when there is no signal and prevent malfunction.

[0173] This utility model discloses an intelligent nursing pad monitoring system, which has the following beneficial effects: 1) Real-time and accurate monitoring, solving the shortcomings of traditional nursing: The system collects the nursing pad wetting status and patient exit signals in real time through moisture-sensitive sensor pads and occupancy sensor pads, changing the traditional mode of manual periodic inspection and experience-based judgment. This solves problems such as failure to detect nursing pad wetting in time and accidents caused by patients leaving the bed, achieving 24-hour uninterrupted monitoring and improving the accuracy and real-time nature of monitoring. 2) Intelligent audio-visual feedback, ensuring timely response to abnormal states: Visual urine wetting prompt: When urine is detected, the indicator light automatically turns on, providing intuitive visual feedback and avoiding oversights during manual inspections. Audible and visual alarm for human escape: When human escape is detected, the buzzer emits a loud sound, quickly attracting the attention of medical staff or family members. The dual feedback mechanism ensures that abnormal states are handled without delay, enhancing the targeted nature of nursing care. 3) Optimizing nursing processes and improving nursing efficiency: The system automatically performs monitoring and feedback, reducing the burden of regular inspections for nursing staff, allowing them to focus on targeted care after an alarm, optimizing workflows, reducing labor costs, and improving the overall efficiency and quality of nursing services. 4) Multi-mode communication support, adapting to diverse scenarios: Through multiple communication modes such as RS485, RV / TXC, high and low level, it can flexibly connect to control boxes or terminal monitoring equipment to realize data interaction and remote management, providing technical support for smart nursing and systematic monitoring, and adapting to the diverse long-term care scenario needs such as aging care and chronic disease rehabilitation.

[0174] In one feasible implementation, a smart nursing pad is provided, comprising a pad body and a smart nursing pad monitoring system as shown in this application, wherein the pad body may include, for example, Figure 7 and Figure 8 The humidity sensor pad and occupancy sensor pad are shown.

[0175] This utility model discloses an intelligent nursing pad, which has the following beneficial effects: real-time and accurate monitoring to solve the shortcomings of traditional nursing; intelligent sound and light feedback to ensure timely response to abnormal conditions; optimized nursing process to improve nursing efficiency; and multi-mode communication support to adapt to diverse scenarios.

[0176] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0177] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An intelligent nursing pad monitoring system, characterized in that, The intelligent nursing pad monitoring system includes: The main control module and the data acquisition module are provided, wherein the output terminal of the data acquisition module is electrically connected to the input terminal of the main control module. The data acquisition module is used to acquire the humidity status data and / or occupancy status data of the nursing pad, and output the humidity status signal and / or occupancy status signal of the nursing pad to the main control module; The main control module is used to receive the humidity status signal and / or occupancy status signal, and output the humidity status prompt signal and / or occupancy status prompt signal of the nursing pad.

2. The system according to claim 1, characterized in that, The system further includes: a power supply module, a communication module, and a status feedback module; the output terminal of the power supply module is electrically connected to the power supply terminal of the main control module and the power supply terminal of the data acquisition module, respectively; the communication module is electrically connected to the communication terminal of the main control module, and the input terminal of the status feedback module is electrically connected to the output terminal of the main control module. The power module is used to output the target power supply signal to the main control module and the data acquisition module; The main control module is also used to output the humidity status prompt signal and / or the occupancy status prompt signal to the communication module and the status feedback module; The status feedback module is used to receive the humidity status prompt signal and / or the occupancy status prompt signal, and output an audible and visual feedback prompt. The communication module is used to receive the humidity status prompt signal and / or occupancy status prompt signal, and send them to a preset client. The client has a communication connection with the main control module.

3. The system according to claim 2, characterized in that, The power module includes at least a power input protection unit, a power conversion unit, and a low-dropout voltage regulator unit; the output terminal of the power module includes the output terminal of the low-dropout voltage regulator unit; the output terminal of the power input protection unit is electrically connected to the input terminal of the power conversion unit; the output terminal of the power conversion unit is electrically connected to the input terminal of the low-dropout voltage regulator unit; and the output terminal of the low-dropout voltage regulator unit is electrically connected to the power supply terminal of the main control module and the power supply terminal of the data acquisition module, respectively. The power input protection unit is used to receive the original power supply signal and output the filtered first power supply signal. The power conversion unit is used to receive the first power supply signal and output the converted second power supply signal to the low dropout voltage regulator unit. The low-dropout voltage regulator unit is used to receive the second power supply signal and output the regulated target power supply signal to the main control module and the data acquisition module.

4. The intelligent nursing pad monitoring system according to claim 3, characterized in that, The data acquisition module includes at least a data processing unit, a humidity sensing unit, and an occupancy sensing unit; the output terminal of the data acquisition module is the output terminal of the data processing unit; the input terminal of the data processing unit is electrically connected to the output terminal of the humidity sensing unit and the output terminal of the occupancy sensing unit, respectively. The humidity-sensitive sensing unit is used to collect the humidity status data of the nursing pad and output the humidity status data to the data processing unit. The occupancy sensing unit is used to collect the occupancy status data of the nursing pad and output the occupancy status data to the data processing unit; The data processing unit is used to receive the humidity status data and / or occupancy status data, and output the humidity status signal and / or occupancy status signal of the nursing pad to the main control module.

5. The system according to claim 2, characterized in that, The status feedback module includes a first illumination prompt unit, a second illumination prompt unit, and an audio prompt unit; the input terminals of the status feedback module include the input terminals of the first illumination prompt unit, the second illumination prompt unit, and the audio prompt unit; the output terminals of the main control module include the first output pin, the second output pin, and the third output pin of the main control chip. The first illumination prompt unit includes a first resistor, a second resistor, a third resistor, a first LED, and a first switching element; the input terminal of the first illumination prompt unit includes one end of the first resistor. One end of the first resistor is electrically connected to the first output pin of the main control chip, and the other end of the first resistor is electrically connected to one end of the second resistor and the gate of the first switching element; the other end of the second resistor is electrically connected to the common ground terminal; the drain of the first switching element is electrically connected to the input terminal of the first LED through the third resistor, and the source of the first switching element is electrically connected to the common ground terminal. The second illumination prompt unit includes a fourth resistor, a fifth resistor, a second switching element, a sixth resistor, and a second LED, and the input terminal of the first illumination prompt unit includes one end of the fourth resistor. One end of the fourth resistor is electrically connected to the second output pin of the main control chip, and the other end of the fourth resistor is electrically connected to one end of the fifth resistor and the gate of the second switching element; the other end of the fifth resistor is electrically connected to the common ground terminal; the drain of the second switching element is electrically connected to the input terminal of the second LED through the sixth resistor, and the source of the second switching element is electrically connected to the common ground terminal. The sound prompt unit includes a seventh resistor, an eighth resistor, a ninth resistor, a buzzer, a third switching element, and a first capacitor. The input terminal of the sound prompt unit includes one end of the seventh resistor. One end of the seventh resistor is electrically connected to the third output pin of the main control chip, and the other end of the seventh resistor is electrically connected to one end of the eighth resistor and the gate of the third switching element; the other end of the eighth resistor is electrically connected to the common ground terminal, and the source of the third switching element is electrically connected to the common ground terminal; one end of the ninth resistor is electrically connected to the first power supply voltage terminal, and the other end of the ninth resistor is electrically connected to the positive terminal of the buzzer; the negative terminal of the buzzer is electrically connected to the drain of the third switching element; one end of the first capacitor is electrically connected to the first power supply voltage terminal, and the other end of the first capacitor is electrically connected to the common ground terminal.

6. The system according to claim 4, characterized in that, The data processing unit includes at least a data processing chip, and the input terminal of the data processing unit includes at least a first input pin and a second input pin of the data processing chip; the output terminal of the data processing unit includes at least a first serial communication pin and a second serial communication pin of the data processing chip; the input terminal of the main control module includes a first serial communication pin and a second serial communication pin of the main control chip. The first input pin of the data processing chip is connected to the output terminal of the humidity sensing unit; the second input pin of the data processing chip is connected to the output terminal of the occupancy sensing unit; the first serial communication pin of the data processing chip is electrically connected to the first serial communication pin of the main control chip; and the second serial communication pin of the data processing chip is electrically connected to the second serial communication pin of the main control chip.

7. The system according to claim 6, characterized in that, The power input protection unit includes a power supply, a power voltage interface, a power ground interface, a common mode inductor, a second capacitor, a third capacitor, a transient voltage suppression diode, a diode, and a fuse. The output terminal of the power input protection unit includes one end of the fuse. The power supply is electrically connected to the power voltage interface; The power ground interface is electrically connected to the digital ground terminal; the first pin of the common mode inductor is electrically connected to the power supply and one end of the second capacitor; the second pin of the common mode inductor is electrically connected to the second power supply voltage terminal and one end of the third capacitor; the third pin of the common mode inductor is electrically connected to the other end of the third capacitor; the fourth pin of the common mode inductor is electrically connected to the other end of the second capacitor; the other end of the second capacitor is electrically connected to the digital ground terminal; and the other end of the third capacitor is electrically connected to the power ground terminal. One end of the transient voltage suppression diode is electrically connected to the second power supply voltage terminal, and the other end of the transient voltage suppression diode is electrically connected to the power ground terminal; one end of the fuse is electrically connected to the input terminal of the power conversion unit; the cathode of the diode is electrically connected to the other end of the fuse; and the anode of the diode is electrically connected to the second power supply voltage terminal.

8. The system according to claim 7, characterized in that, The power conversion unit includes: a DC-DC converter, a tenth resistor, an eleventh resistor, a twelfth resistor, an inductor, and a freewheeling diode; the input terminal of the power conversion unit is one end of the tenth resistor; the output terminal of the power conversion unit is one end of the inductor; one end of the inductor is electrically connected to the input terminal of the low dropout voltage regulator unit. One end of the tenth resistor is electrically connected to one end of the fuse; the other end of the tenth resistor is electrically connected to the enable pin of the DC-DC converter; the switch pin of the DC-DC converter is electrically connected to the other end of the inductor and the cathode of the freewheeling diode, respectively; the anode of the freewheeling diode is electrically connected to the common ground terminal; the feedback pin of the DC-DC converter is electrically connected to one end of the eleventh resistor and one end of the twelfth resistor, respectively; the other end of the eleventh resistor is electrically connected to one end of the inductor; and the other end of the twelfth resistor is electrically connected to the common ground terminal.

9. The system according to claim 8, characterized in that, The low-dropout voltage regulator unit includes: a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, and a fuse resistor; the input terminal of the low-dropout voltage regulator unit includes one end of the fourth capacitor; the output terminal of the low-dropout voltage regulator unit includes a first power supply voltage terminal; the first power supply voltage terminal is electrically connected to the power supply terminal of the main control module and the power supply terminal of the data acquisition module respectively; one end of the fourth capacitor is electrically connected to one end of the inductor. One end of the fourth capacitor is also electrically connected to one end of the fifth capacitor; the other end of the fourth capacitor is electrically connected to one end of the twelfth resistor; one end of the fifth capacitor is also electrically connected to one end of the sixth capacitor; one end of the sixth capacitor is also electrically connected to the other end of the fuse resistor; the other end of the fuse resistor is electrically connected to one end of the seventh capacitor; the other ends of the fifth, sixth, and seventh capacitors are electrically connected to the common ground terminal; and one end of the fuse resistor is also electrically connected to the first power supply voltage terminal.

10. A smart nursing pad, characterized in that, The smart nursing pad includes the pad body and the smart nursing pad monitoring system as described in any one of claims 1 to 9.

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