Compressed oxygen self-rescuer circuit structure

Abstract

The utility model discloses a compressed oxygen self-rescuer circuit structure, which acquires data in real time through an air pressure sensing module, processes the data and transmits the data to a main control MCU (Microprogrammed Control Unit) module, provides accurate oxygen allowance information for a user and ensures the reasonability of an escape decision. The power management module outputs stable voltage, reduces the influence of voltage fluctuation, prolongs the service life of a battery, reduces the maintenance cost, and improves the reliability of equipment. The wireless communication module supports Bluetooth and 2.4 GHz wireless transmission, data interaction between the self-rescuer and external equipment is achieved, and rescue work is assisted to be efficiently carried out; the display module clearly displays key information, and a power supply switch is intelligently controlled, so that information reading is facilitated, and electric quantity can be saved; the program downloading interface module simplifies the program burning and debugging process, so that technicians can conveniently optimize the equipment performance in time; the wake-up control module realizes low-power-consumption standby and light-touch wake-up, and ensures that the equipment can be used at any time; and the alarm module gives out an acousto-optic alarm in case of abnormity, so that a user is reminded to take corresponding measures in time.

Description

Technical Field

[0001] This utility model relates to the field of compressed oxygen self-rescue device technology, specifically to a circuit structure for a compressed oxygen self-rescue device. Background Technology

[0002] Compressed oxygen self-rescue devices are crucial equipment in industries such as coal mining, chemical engineering, and mining, providing emergency breathing oxygen to personnel in emergency situations. Their performance is directly related to the safety of users. With industrial development and increased safety awareness, higher requirements are being placed on their functions and performance.

[0003] Traditional compressed oxygen self-rescue devices suffer from numerous flaws in their circuit structure. In terms of pressure monitoring, the sensors have low accuracy and slow response, failing to accurately and in real-time acquire changes in oxygen cylinder pressure, thus affecting the assessment of remaining oxygen levels. Power management lacks an effective module, resulting in unstable voltage that impacts the operation of various modules and battery life. Communication functions are limited, often relying on wired communication or lacking any communication capability altogether, hindering the transmission of rescue information. The display module is rudimentary, displaying limited information with poor clarity. Program updates and debugging are complex, requiring professional personnel and equipment. The lack of a wake-up control mechanism leads to unnecessary battery consumption, reduced battery life, and compromised device reliability.

[0004] Therefore, the traditional circuit structure of compressed oxygen self-rescue devices can no longer meet the safety requirements of modern industry. There is an urgent need for a new, high-performance circuit structure to solve the above problems and improve its safety, reliability and practicality. Utility Model Content

[0005] The purpose of this invention is to provide a circuit structure for a compressed oxygen self-rescue device, in order to solve the problems of inaccurate air pressure monitoring, unstable power supply, limited communication, poor display, difficulty in program updates, and high power consumption in traditional technologies.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A circuit structure for a compressed oxygen self-rescue device includes a main control MCU module, a pressure sensing module, a power management module, a wireless communication module, a display module, a program download interface module, and a wake-up control module; the main control MCU module is connected to the pressure sensing module, the wireless communication module, the display module, the program download interface module, and the wake-up control module respectively;

[0007] The power management module is used to provide regulated power to the main control MCU module, the air pressure sensing module, the wireless communication module, and the display module. The power management module is connected to an external battery through a lithium battery output interface.

[0008] The pressure sensing module is used to collect oxygen cylinder pressure data in real time and transmit it to the main control MCU module via the ADC interface; the wireless communication module supports Bluetooth or 2.4GHz wireless transmission; the program download interface module is used to program and debug the main control MCU module; the wake-up control module is used to trigger system wake-up via a touch switch.

[0009] As a preferred circuit structure for the compressed oxygen self-rescue device, the main control MCU module uses the FM33LE025 chip and interacts with the air pressure sensing module through the SPI interface to receive and process air pressure data.

[0010] As a preferred circuit structure for a compressed oxygen self-rescue device, the pressure sensing module includes a YS2023 ceramic pressure sensor. The pressure analog signal output by the pressure sensing module is filtered by a filter circuit composed of resistor R60 and capacitor C6, amplified and shaped by a signal conditioning circuit, and then transmitted to the main control MCU module through an ADC interface.

[0011] As a preferred circuit structure for the compressed oxygen self-rescue device, the power management module includes an XC6206 voltage regulator chip. The lithium battery output interface is connected to the input terminal VIN of the XC6206 voltage regulator chip, and the output terminal VOUT of the XC6206 voltage regulator chip outputs a stable 3.3V voltage. Filter capacitors C11 and C12 are connected in parallel between VOUT and GND to filter out voltage fluctuations.

[0012] As a preferred embodiment of the circuit structure of the compressed oxygen self-rescue device, the wireless communication module includes Bluetooth communication and 2.4GHz wireless communication components;

[0013] Bluetooth communication uses a YCI323 / QFN-20 chip, with the BLE_TX and BLE_RX pins used for transmitting and receiving Bluetooth data, respectively.

[0014] The 2.4GHz wireless communication uses the NRF24L01+ module, which connects to the main control MCU module via the SPI interface;

[0015] The wireless communication module is equipped with a 2.4G power supply switch using an SI2301CDS-T1-GE3 transistor, which is controlled by the GPIO pin of the main control MCU module to achieve power supply control.

[0016] As a preferred circuit structure for a compressed oxygen self-rescue device, the display module includes an LCD display screen of model PIC401, which is connected to the main control MCU module via an I2C interface. The I2C interface includes LCD_SDA, LCD_SCL, LCD_CS, and LCD_RST signal lines. The display module is equipped with a power supply switch for the display screen, which is controlled by the main control MCU module to turn the power on and off.

[0017] As a preferred circuit structure for the compressed oxygen self-rescue device, the program download interface module adopts the ST-LINK interface and is connected to the SWDIO, SWDCLK, and NRST pins of the main control MCU module to realize firmware burning and debugging of the main control MCU module.

[0018] As a preferred embodiment of the compressed oxygen self-rescue device circuit structure, it also includes an alarm module, which includes a buzzer and an alarm indicator light; the buzzer is connected to the GPIO pin of the main control MCU module through a transistor Q7;

[0019] The alarm indicator is a red LED, connected in series with resistor R28 between the 3.3V power supply and GND. It is controlled by the main control MCU module to light up or turn off to provide an abnormal warning.

[0020] The beneficial effects of this invention are as follows: The air pressure sensing module collects data in real time, processes it, and transmits it to the main control MCU module, providing users with accurate oxygen reserve information and ensuring the rationality of escape decisions. The power management module outputs a stable voltage, reducing the impact of voltage fluctuations, extending battery life, reducing maintenance costs, and improving equipment reliability. The wireless communication module supports Bluetooth and 2.4GHz wireless transmission, enabling data interaction between the self-rescue device and external devices, facilitating efficient rescue operations. The display module clearly presents key information, and the intelligent power switch control facilitates information reading and saves power. The program download interface module simplifies the program burning and debugging process, allowing technicians to optimize device performance in a timely manner. The wake-up control module enables low-power standby and touch-activated wake-up, improving battery life and ensuring the device is always available. The alarm module emits audible and visual warnings in case of abnormalities, promptly reminding users to take appropriate measures. Attached Figure Description

[0021] To more clearly illustrate the embodiments of the present invention or the technical solutions in 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 merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0022] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0023] Figure 1 This is a schematic diagram of the circuit structure framework of the compressed oxygen self-rescue device provided in the embodiment of this utility model;

[0024] Figure 2 This is part one of the circuit diagrams of the compressed oxygen self-rescue device provided in the embodiments of this utility model;

[0025] Figure 3 Part two of the circuit diagram for the compressed oxygen self-rescue device provided in this embodiment of the present utility model.

[0026] In the diagram, 1. Main control MCU module; 2. Barometric pressure sensor module; 3. Power management module; 4. Wireless communication module; 5. Display module; 6. Program download interface module; 7. Wake-up control module; 8. Alarm module. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0029] See Figure 1 , Figure 2 and Figure 3 This utility model embodiment provides a circuit structure for a compressed oxygen self-rescue device, including a main control MCU module, a pressure sensing module 2, a power management module 3, a wireless communication module 4, a display module 5, a program download interface module 6, and a wake-up control module 7; the main control MCU module is connected to the pressure sensing module 2, the wireless communication module 4, the display module 5, the program download interface module 6, and the wake-up control module 7 respectively.

[0030] The power management module 3 is used to provide regulated power to the main control MCU module, the air pressure sensing module 2, the wireless communication module 4, and the display module 5. The power management module 3 is connected to an external battery through a lithium battery output interface.

[0031] The pressure sensing module 2 is used to collect oxygen cylinder pressure data in real time and transmit it to the main control MCU module through the ADC interface; the wireless communication module 4 supports Bluetooth or 2.4GHz wireless transmission; the program download interface module 6 is used to program and debug the main control MCU module; and the wake-up control module 7 is used to trigger system wake-up through a touch switch.

[0032] In this embodiment, the main control MCU module uses the FM33LE025 chip and interacts with the air pressure sensing module 2 through the SPI interface to receive and process air pressure data.

[0033] Specifically, the FM33LE025 chip is a low-power microcontroller suitable for portable devices with high power consumption requirements. The SPI interface is a high-speed serial communication interface that supports full-duplex communication. When interacting with the barometric pressure sensor module 2, the main control MCU module sends clock signals and control commands to the barometric pressure sensor via the SPI interface, and then reads the raw barometric pressure data collected by the sensor. Since the collected data is an analog signal, it needs to be converted from analog to digital signals within the main control MCU module. Next, the main control MCU module processes these digital signals using existing filtering algorithms to remove potential interference and noise, obtaining accurate barometric pressure values. These accurate barometric pressure values ​​can be used for subsequent display, alarm judgment, and data transmission via the wireless communication module 4.

[0034] In this embodiment, the air pressure sensing module 2 includes a YS2023 ceramic pressure sensor. The air pressure analog signal output by the air pressure sensing module 2 is filtered by a filter circuit composed of resistor R60 and capacitor C6, amplified and shaped by a signal conditioning circuit, and then transmitted to the main control MCU module through the ADC interface.

[0035] Specifically, the YS2023 ceramic pressure sensor converts pressure changes into resistance changes based on the piezoresistive effect, and then outputs a weak analog voltage signal through a Wheatstone bridge. The RC filter circuit composed of resistor R60 and capacitor C6 is a simple and effective filtering method. Capacitor C6 presents low impedance to high-frequency signals, while resistor R60 provides some resistance, thus bypassing high-frequency noise signals to ground, thereby filtering out high-frequency noise and improving signal quality. The operational amplifier in the signal conditioning circuit amplifies and linearizes the filtered signal. Amplification ensures that the signal amplitude meets the input range of the ADC interface of the main control MCU module for more accurate analog-to-digital conversion. Linearization ensures a linear relationship between the signal and the actual pressure value, facilitating subsequent data processing and analysis. The conditioned analog signal is converted into a digital signal through the ADC interface for further processing by the main control MCU module.

[0036] In this embodiment, the power management module 3 includes an XC6206 voltage regulator chip. The lithium battery output interface is connected to the input terminal VIN of the XC6206 voltage regulator chip. The output terminal VOUT of the XC6206 voltage regulator chip outputs a stable voltage of 3.3V. Filter capacitors C11 and C12 are connected in parallel between VOUT and GND to filter out voltage fluctuations.

[0037] Specifically, the XC6206 voltage regulator chip is a low-dropout linear regulator (LDO). Its working principle involves real-time monitoring of the output voltage through an internal feedback circuit. Based on the deviation between the output voltage and the set value (3.3V), the circuit adjusts the conduction level of the internal regulating transistor to maintain a stable output voltage. When the lithium battery output voltage or load current changes, the feedback circuit promptly adjusts the regulating transistor to ensure the output voltage remains stable at 3.3V. The filter capacitors C11 and C12 serve different purposes. C11 is typically a large-capacity electrolytic capacitor capable of storing charge. When the load current suddenly increases, C11 can provide additional current, reducing the voltage drop; when the load current decreases, C11 can absorb excess charge, preventing the voltage from rising. C12 is usually a smaller-capacity ceramic capacitor. It has a fast response speed to high-frequency signals and can effectively filter out high-frequency noise, resulting in a cleaner output voltage.

[0038] In one possible embodiment, the wireless communication module 4 includes Bluetooth communication and 2.4GHz wireless communication components; the Bluetooth communication uses a YCI323 / QFN-20 chip, with the BLE_TX and BLE_RX pins used for transmitting and receiving Bluetooth data, respectively; the 2.4GHz wireless communication uses an NRF24L01+ module, which is connected to the main control MCU module via an SPI interface; the wireless communication module 4 is equipped with a 2.4G power supply switch using an SI2301CDS-T1-GE3 transistor, which is controlled by the GPIO pins of the main control MCU module to achieve power supply control.

[0039] Specifically, in the Bluetooth communication section, the YCI323 / QFN-20 chip supports the BLE low-power Bluetooth protocol. When data needs to be sent, the main control MCU module sends the data to the chip's BLE_TX pin. The chip encodes and modulates the data according to the BLE protocol and then transmits it through the antenna. When receiving data from an external device, the chip demodulates and decodes the signal and transmits the data to the main control MCU module through the BLE_RX pin. For the 2.4GHz wireless communication section, the NRF24L01+ module connects to the main control MCU module via an SPI interface. The high-speed communication capability of the SPI interface allows the main control MCU module to quickly interact with the NRF24L01+ module, achieving high-speed wireless data transmission. To reduce power consumption, the wireless communication module 4 is equipped with a power switch. The SI2301CDS-T1-GE3 transistor acts as a switching element. When the GPIO pin of the main control MCU module outputs a high level, the transistor conducts, supplying power to the wireless communication module 4 for normal operation; when the GPIO pin outputs a low level, the transistor is cut off, the wireless communication module 4 is powered off, and enters a low-power state.

[0040] In one possible embodiment, the display module 5 includes an LCD display screen of model PIC401, which is connected to the main control MCU module via an I2C interface. The I2C interface includes LCD_SDA, LCD_SCL, LCD_CS, and LCD_RST signal lines. The display module 5 is equipped with a display screen power supply switch, which is controlled by the main control MCU module to turn the power supply on and off of the display screen.

[0041] Specifically, the PIC401's LCD display communicates with the main control MCU module via the I2C interface. I2C is a serial communication protocol, where LCD_SDA is the data line for data transmission; LCD_SCL is the clock line for synchronous data transmission; LCD_CS is the chip select signal for selecting a specific display device; and LCD_RST is used to reset the display. According to the I2C protocol, the main control MCU module sends commands and data to the display via these signal lines to control the display to show corresponding content, such as the oxygen cylinder pressure value and battery level. To save power, the display module 5 is equipped with a power switch. When no information is needed, the main control MCU module controls the power switch to turn off, powering off the display and reducing power consumption; when information needs to be displayed, the main control MCU module controls the power switch to turn on, powering on the display to show the required information.

[0042] In one possible embodiment, the program download interface module 6 adopts an ST-LINK interface and is connected to the SWDIO, SWDCLK, and NRST pins of the main control MCU module to realize firmware burning and debugging of the main control MCU module.

[0043] Specifically, the ST-LINK interface is based on the SWD serial line debugging protocol. The SWD protocol is a simple and efficient debugging protocol that requires only two signal lines (SWDIO and SWDCLK) to achieve data transmission and debugging functions. During firmware burning, the development tool sends the compiled firmware program to the Flash memory of the FM33LE025 chip in the main control MCU module via the ST-LINK interface through the SWDIO pin. The SWDCLK pin provides a clock signal to ensure the synchronization of data transmission. The NRST pin is used to reset the chip; before burning the program, the chip is reset to its initial state to ensure the accuracy of the program burning. During debugging, the development tool can perform real-time debugging and single-step execution on the chip through the SWD protocol, facilitating developers to find and resolve problems in the program.

[0044] In one possible embodiment, an alarm module 8 is also included, which includes a buzzer and an alarm indicator light. The buzzer is connected to the GPIO pin of the main control MCU module through a transistor Q7. The alarm indicator light is a red LED, which is connected in series with a resistor R28 between a 3.3V power supply and GND. The main control MCU module controls the LED to light up or turn off to provide an abnormal warning.

[0045] Specifically, the alarm module 8's function is to promptly issue warning signals to the user in case of abnormal conditions. When the main control MCU module detects abnormal air pressure (such as low air pressure) or insufficient battery power, it will output a high-level signal through the GPIO pin. Transistor Q7, acting as a switching element, conducts when its base receives a high-level signal, energizing the buzzer and emitting an alarm sound. The red LED, connected in series with resistor R28, is connected between the 3.3V power supply and GND. The main control MCU module controls the anode voltage of the red LED by controlling the level of the GPIO pin. Resistor R28 limits current, preventing excessive current from flowing through the LED and thus avoiding damage. When the main control MCU module detects an abnormality, it controls the LED to light up, creating a dual audible and visual alarm along with the buzzer sound, attracting the user's attention.

[0046] 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.

[0047] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A compressed oxygen self-rescuer circuit structure, characterized by, It includes a main control MCU module (1); a barometric pressure sensor module (2); a power management module (3); a wireless communication module (4); a display module (5); a program download interface module (6); and a wake-up control module (7); the main control MCU module (1) is connected to the barometric pressure sensor module (2), the wireless communication module (4), the display module (5), the program download interface module (6), and the wake-up control module (7), respectively; The power management module (3) is used to provide regulated power to the main control MCU module (1), the air pressure sensing module (2), the wireless communication module (4), and the display module (5). The power management module (3) is connected to an external battery through a lithium battery output interface. The pressure sensing module (2) is used to collect oxygen cylinder pressure data in real time and transmit it to the main control MCU module (1) through the ADC interface; the wireless communication module (4) supports Bluetooth or 2.4GHz wireless transmission; the program download interface module (6) is used to burn and debug the program to the main control MCU module (1); the wake-up control module (7) is used to trigger the system wake-up through a light touch switch.

2. The compressed oxygen self-rescuer circuit structure of claim 1, wherein, The main control MCU module (1) uses the FM33LE025 chip and interacts with the air pressure sensing module (2) through the SPI interface to receive and process air pressure data.

3. The compressed oxygen self-rescuer circuit structure of claim 1, wherein, The air pressure sensing module (2) includes a YS2023 ceramic pressure sensor. The air pressure analog signal output by the air pressure sensing module (2) is filtered by a filter circuit composed of resistor R60 and capacitor C6, amplified and shaped by a signal conditioning circuit, and then transmitted to the main control MCU module (1) through the ADC interface.

4. The compressed oxygen self-rescuer circuit structure of claim 1, wherein, The power management module (3) includes an XC6206 voltage regulator chip. The lithium battery output interface is connected to the input terminal VIN of the XC6206 voltage regulator chip. The output terminal VOUT of the XC6206 voltage regulator chip outputs a stable voltage of 3.3V. Filter capacitors C11 and C12 are connected in parallel between VOUT and GND to filter out voltage fluctuations.

5. The compressed oxygen self-rescuer circuit structure of claim 1, wherein, The wireless communication module (4) includes Bluetooth communication and 2.4GHz wireless communication components; Bluetooth communication uses a YCI323 / QFN-20 chip, with the BLE_TX and BLE_RX pins used for transmitting and receiving Bluetooth data, respectively. The 2.4GHz wireless communication uses the NRF24L01+ module, which is connected to the main control MCU module (1) via the SPI interface; The wireless communication module (4) is equipped with a 2.4G power supply switch using an SI2301CDS-T1-GE3 transistor, which is controlled by the GPIO pin of the main control MCU module (1) to turn on or off to achieve power supply control.

6. The compressed oxygen self-rescuer circuit structure of claim 1, wherein, The display module (5) includes an LCD display screen of model PIC401, which is connected to the main control MCU module (1) through an I2C interface. The I2C interface includes LCD_SDA, LCD_SCL, LCD_CS and LCD_RST signal lines. The display module (5) is equipped with a display screen power supply switch, which is controlled by the main control MCU module (1) to turn the power on and off of the display screen.

7. The compressed oxygen self-rescuer circuit structure of claim 1, wherein, The program download interface module (6) adopts the ST-LINK interface and is connected to the SWDIO, SWDCLK and NRST pins of the main control MCU module (1) to realize firmware burning and debugging of the main control MCU module (1).

8. The compact oxygen self-rescuer circuit arrangement of claim 1, wherein, It also includes an alarm module (8), which includes a buzzer and an alarm indicator light. The buzzer is connected to the GPIO pin of the main control MCU module (1) through a transistor Q7. The alarm indicator light is a red LED, which is connected in series with a resistor R28 between a 3.3V power supply and GND. It is controlled by the main control MCU module (1) to light up or turn off to provide an abnormal warning.

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