Portable cardio-pulmonary resuscitation machine calibration device

Abstract

The invention provides a portable cardiopulmonary resuscitation machine calibration device, and belongs to the technical field of cardiopulmonary resuscitation. Comprising an outer frame, an inner frame and a pressing automatic rebounding part, the inner frame is stably installed in the outer frame, the pressing automatic rebounding part is located in the inner frame, the bottom of the pressing automatic rebounding part is stably installed at one end of the outer frame, and the top of the pressing automatic rebounding part is flush with the other end of the outer frame; a laser ranging module, a frequency detection module, an AD conversion circuit module and a power conversion circuit module are arranged in the pressing automatic rebounding part. Through cooperation of the laser ranging module, the frequency detection module, the AD conversion circuit module and the pressing automatic rebounding part, the purpose of obtaining high-precision pressing depth and frequency data is achieved, reliable data support is provided for calibration of the cardio-pulmonary resuscitation machine, and the effect of improving calibration accuracy is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of cardiopulmonary resuscitation, and particularly relates to a portable calibration device for a cardiopulmonary resuscitation machine. Background Art

[0002] Cardiopulmonary resuscitation is an important first-aid measure for rescuing patients with cardiac arrest and respiratory arrest. Cardiopulmonary resuscitation machines play a key role in the first-aid process. With the continuous development of medical first-aid technology, the performance requirements for cardiopulmonary resuscitation machines are getting higher and higher. Accurate compression depth and frequency are key indicators for cardiopulmonary resuscitation machines to play an effective role, which requires regular calibration of cardiopulmonary resuscitation machines to ensure that their performance meets the standards.

[0003] Currently, in the field of cardiopulmonary resuscitation machine calibration, traditional compression depth measurement relies on visual inspection with a steel ruler, and the frequency is counted manually. This method is not only inefficient but also has large errors. Due to the influence of human factors, the measurement results of different operators may vary, resulting in inaccurate calibration of cardiopulmonary resuscitation machines and unable to ensure the effectiveness of the equipment in actual use. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a portable calibration device for a cardiopulmonary resuscitation machine to solve the technical problems proposed in the background art.

[0005] Technical Solution: To achieve the above object, the present invention is realized through the following technical solutions: A portable calibration device for a cardiopulmonary resuscitation machine, comprising: an outer frame, an inner frame, and a pressing and automatic rebounding part. The inner frame is installed inside the outer frame, the pressing and automatic rebounding part is integrated inside the inner frame, the bottom of the pressing and automatic rebounding part is connected to one end of the outer frame, and the top is flush with the other end of the outer frame; The pressing and automatic rebounding part includes: A laser ranging module, installed on the pressing and automatic rebounding part, for measuring the compression depth of the cardiopulmonary resuscitation machine; A pressure detection module, installed on the pressing and automatic rebounding part, for detecting the pressing force during the compression of the cardiopulmonary resuscitation machine; A frequency detection module, installed on the pressing and automatic rebounding part, for measuring the compression frequency of the cardiopulmonary resuscitation machine; An AD conversion circuit module, which is used to convert and process the analog signals collected by the laser ranging module, the frequency detection module, and the pressure detection module; A power conversion circuit module, which is used to provide stable power for the entire calibration device. Among them, the outer frame is provided with a pull handle, universal wheels, and a strap buckle, etc. The pull handle and universal wheels are used to facilitate the movement of the device, and the strap buckle is used to provide a connection position for the cardiopulmonary resuscitation machine and the device. A counterweight can also be added inside the side wall of the inner frame.

[0006] In a further embodiment, the pressing automatic rebound part further comprises: A bottom plate, installed inside the outer frame; A detection platform, arranged directly above the bottom plate; A main support frame, which is located between the bottom plate and the detection platform, and the main support frame is composed of two groups of connecting rods that are cross-rotationally connected, and the cross-connection point is at the center of the long direction of the connecting rod; There are four guide rails, and the four guide rails are respectively arranged on the bottom plate and the detection platform, and the guide rails on the bottom plate and the detection platform are symmetric with respect to the center points of the bottom plate and the detection platform; A slider is connected to the guide rail, and the slider is rotationally connected to one end of the connecting rod; A buffer, installed on the detection platform through a buffer bracket, and the buffer is used to avoid vibration and noise; A hook spring, one end of which is connected to the detection platform through a hook spring bracket, and the other end is connected to one end of the connecting rod on the detection platform.

[0007] In a further embodiment, a lithium battery and a microcontroller are also installed in the pressing automatic rebound part. The capacity of the lithium battery should meet the continuous working requirements of the device within a certain period of time, and has overcharge and over-discharge protection functions to prevent battery damage and safety accidents; the operation speed and storage capacity of the microcontroller should meet the requirements of data processing and storage, and have a certain anti-interference ability to be able to work stably in a complex electromagnetic environment; the working temperature range of the microcontroller should be adapted to the use environment of the device to ensure normal operation under different temperature conditions.

[0008] In a further embodiment, a power switch and a charging interface are provided on the inner frame. The power switch is used to control the power on and off of the entire calibration device, and the charging interface is used to connect to an external power source to charge the lithium battery installed in the pressing automatic rebound part. Among them, the power switch should have waterproof and dustproof functions, and its protection level should meet relevant standards to prevent moisture and dust from entering the inside of the switch and causing failures; the charging interface should support fast charging technology, and can automatically detect the battery status during charging, adjust the charging current and voltage to ensure the safety and efficiency of charging; the installation positions of the power switch and the charging interface should be convenient for operation and observation, and maintain a certain safety distance from other components to prevent mutual interference.

[0009] In a further embodiment, an ADR433B chip, an AD5542C chip and an OP97A chip are provided in the AD conversion circuit module; pin 2 of the ADR433B chip is connected to the VCC power supply and is grounded through a parallel-connected capacitor C1 and C2 at the same time, playing a filtering role to ensure the stability of the input power supply; pin 4 is directly grounded, pin 6 outputs the reference voltage VREF, on the one hand, it is connected to capacitors C3 and C4 and then grounded to further stabilize the reference voltage; on the other hand, it is connected to pin 6 of the AD5542C chip to provide a reference voltage for the AD5542C; pin 5 is left unconnected, and pins 1, 3, 7, and 8 are empty pins and not connected; pin 14 of the AD5542C chip is connected to the VCC power supply, and pins 12, 3, and 4 are directly grounded, which are used for the connection of digital ground and analog ground respectively to ensure that digital and analog circuits do not interfere with each other; pin 6 is connected to the reference voltage VREF output by the ADR433B chip; pin 9 is an empty pin and not connected; pin 8 is connected to the clock signal CLK1-1, pin 7 is connected to the chip select signal CS1-1, pin 10 is used for inputting data, and pin 11 is used for loading data control; pin 2 outputs the converted analog signal and is connected to pin 3 of the OP97A chip; pins 1 and 13 cooperate with the OP97A chip to form a feedback circuit; pin 7 of the OP97A chip is connected to the VDD power supply, and pin 4 is connected to the VSS; pin 3 receives the analog signal output by the AD5542C, and pin 6 outputs the processed signal. The reference voltage accuracy of the ADR433B chip should meet the requirements of the AD5542C chip and remain stable within a certain temperature range. The conversion speed and accuracy of the AD5542C chip should meet the data processing requirements of the device, and its interface standard should be compatible with the microcontroller; the amplification factor and bandwidth of the OP97A chip should be reasonably selected according to the requirements of signal processing, and it should have the characteristics of low noise and low distortion; the wires connecting the chips should be shielded to avoid the influence of external electromagnetic interference on signal transmission. At the same time, the layout of the circuit board should follow relevant design specifications to reduce crosstalk between signals.

[0010] In a further embodiment, a CH5619 chip is provided in the power conversion circuit module. Pin 5 of the CH5619 chip is connected to the +12V power supply filtered by the parallel capacitors CIN and C1 to provide an input voltage for the chip; pin 1 is directly grounded to ensure a stable reference potential for the circuit; pin 3 is connected to a switch signal for controlling whether the chip works. When a high-level signal is received at this pin, the chip is turned on, and a low level turns it off; pin 4 outputs a switch signal and is connected to the inductor L. Through the energy storage and release characteristics of the inductor, cooperating with the diode D1 and the output capacitor COUT, the voltage is converted and a stable 5V / 5A power supply is output to the load; the resistors R1 and R2 form a feedback circuit and are connected to the inside of the chip to adjust the output voltage. The CFF capacitor is connected in parallel with R2 and serves as a frequency compensation function to improve the stability and dynamic response performance of the circuit. The input voltage range and output current of the CH5619 chip should meet the power supply requirements of the device and be able to work stably under different load conditions; the capacitance and withstand voltage values of the parallel capacitors CIN and C1 should be selected according to the characteristics of the input power supply to ensure the filtering effect; the inductance value and saturation current of the inductor L should meet the requirements of the circuit. The diode D1 should be a fast-recovery diode to reduce the reverse recovery time and improve the power conversion efficiency; the accuracy of the resistors R1 and R2 in the feedback circuit should be within a certain range to ensure the adjustment accuracy of the output voltage; the capacitance of the CFF capacitor should be optimized according to the characteristics of the circuit to ensure the frequency compensation effect.

[0011] In a further embodiment, a data storage module is also provided in the microcontroller. The data storage module is used to store the cardiopulmonary resuscitation machine compression depth data collected by the laser ranging module, the pressure data detected by the pressure detection module, the compression frequency data obtained by the compression frequency detection module, and the digital signal data converted by the AD conversion circuit module. The storage capacity of the data storage module should be selected according to the usage requirements of the device to ensure that a sufficient number of measurement data can be stored; the read and write speed of the data storage module should meet the data processing requirements of the microcontroller and have a certain anti-interference ability to prevent data loss or damage; the communication protocol between the microcontroller and the data storage module should adopt a reliable protocol, such as the SPI protocol or the I2C protocol, to ensure the accuracy and stability of data transmission; the data storage module should have a data verification and error correction function to improve the reliability of the data.

[0012] In a further embodiment, a communication module is further provided in the pressing and automatic rebounding part. A USR-WIFI232 chip is provided in the communication module. Pin 16 of the USR-WIFI232 chip is connected to a 3.3V power supply to supply power to the module. At the same time, it is grounded through a capacitor C4 to play a filtering role and ensure the stability of the power supply. Pins 17 and 18 are grounded and are respectively used for connecting digital ground and isolated ground. Pin 2 is connected to the power supply to supply power to the internal digital circuit. Pins 4 and 5 are respectively the serial port transmit and receive pins. Pin 4 is connected to the serial port receive end of an external device through a resistor R31, and pin 5 is connected to the serial port transmit end of the external device through a resistor R34 to realize the transmission of serial communication data. Pins 3, 6, and 9 are function pins and are respectively connected to an external control circuit or a pull-up / pull-down resistor. Pin 6 is a reset pin, which is active low and is used to reset the module. Pin 9 is connected to an external circuit and can realize the reset control of the WIFI function. Pins 7 and 8 are serial port hardware flow control pins. Pin 10 is a WIFI connection status indication pin and can be connected to an indicator light circuit to display the WIFI connection status of the module. Pin 11 is a module busy status indication pin and can be connected to a relevant circuit to judge whether the module is in a busy state. The communication distance and transmission rate of the USR-WIFI232 chip should meet the data transmission requirements of the device and be able to work stably in a certain interference environment. The capacitance and withstand voltage value of the capacitor C4 should be selected according to the power supply characteristics to ensure the filtering effect. The resistance values of the resistors R31 and R34 should be reasonably selected according to the requirements of serial communication to ensure the transmission quality of the signal. The external control circuit connected to the function pins should meet the electrical characteristic requirements of the chip, and the resistance values of the pull-up / pull-down resistors should be within a suitable range. The indicator lights connected to the WIFI connection status indication pin and the module busy status indication pin should have obvious indication effects for easy observation by the operator.

[0013] In a further embodiment, an MCU chip, a 5V voltage stabilizing circuit, a 3.3V voltage stabilizing circuit, a boosting circuit, and a voltage dividing circuit are provided in the microcontroller. The model of the MCU chip should be selected according to the function requirements and performance requirements of the device and should have sufficient computing power and peripheral interfaces. The output voltage accuracy of the voltage stabilizing circuit should meet the requirements of the MCU chip and should have a certain load regulation ability. The conversion efficiency and output voltage range of the boosting circuit and the voltage dividing circuit should meet the working requirements of other modules and be able to work stably under different load conditions. The voltage stabilizing circuit, the boosting circuit, and the voltage dividing circuit should have functions such as overvoltage protection and overcurrent protection to prevent circuit failures.

[0014] In a further embodiment, the laser ranging module is installed between two sliders on the bottom plate. The laser ranging module slides along with the two sliders on the bottom plate. The connection structure between the laser ranging module and the slider should have a certain rigidity to prevent shaking or displacement during the sliding process. The installation position of the laser ranging module should be on the center line of the bottom plate or at a precisely calculated position to ensure the accuracy of the measurement results. The installation angle of the laser ranging module should meet the measurement requirements, and calibration and debugging should be carried out after installation to ensure the measurement accuracy. The sliders installed with the laser ranging module should have the same motion characteristics as other sliders to avoid measurement errors caused by slider differences.

[0015] Beneficial effects: 1. Through the cooperation of the laser ranging module, frequency detection module, AD conversion circuit module, and the pressing and automatic rebounding part, the laser ranging module accurately measures the pressing depth of the cardiopulmonary resuscitation machine, the frequency detection module accurately measures the pressing frequency, and the AD conversion circuit module converts the analog signals collected by the two into digital signals, achieving the purpose of obtaining high-precision pressing depth and frequency data, realizing providing reliable data support for calibrating the cardiopulmonary resuscitation machine, and enhancing the calibration accuracy.

[0016] The bottom plate, detection platform, main support frame, guide rail, slider, buffer, and hook spring of the pressing and automatic rebounding part cooperate with each other. The cross-rotating connection of the main support frame and the symmetric distribution of the guide rail sliders enable the pressing and automatic rebounding part to adapt to the pressing of cardiopulmonary resuscitation machines of different specifications. The hook spring realizes automatic rebounding, and the buffer avoids vibration and noise, achieving the purpose of stabilizing the pressing descent height and rebounding position, realizing creating a stable environment for measurement, and improving the measurement accuracy and stability.

[0017] The CH5619 chip, parallel capacitors CIN and C1, inductor L, diode D1, output capacitor COUT, and feedback resistors R1, R2, etc. in the power conversion circuit module cooperate with each other. The CH5619 chip converts the +12V power supply into a 5V / 5A stable power supply, and each component works together to stably output the voltage, achieving the purpose of providing a stable power supply for the entire calibration device, realizing ensuring the normal operation of each module of the device, and extending the service life of the equipment. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 is the developed view of Figure 1 .

[0021] Figure 3 is the structural schematic diagram of the pressing automatic rebound part.

[0022] Figure 4 is the connection schematic diagram of the hook spring.

[0023] Figure 5 is the overall block diagram of the circuit principle of the present invention.

[0024] Figure 6 is the structural schematic diagram of the MCU chip.

[0025] Figure 7 is the circuit connection schematic diagram of the laser ranging module and the divided ground.

[0026] Figure 8 is the connection schematic diagram of the frequency detection module circuit.

[0027] Figure 9 is the circuit connection schematic diagram of the Zigbee-LRF215A-PA module.

[0028] Figure 10 is the connection schematic diagram of the storage module circuit.

[0029] Figure 11 is the connection schematic diagram of the 5V voltage stabilization circuit.

[0030] Figure 12 is the connection schematic diagram of the battery charging circuit.

[0031] Figure 13 is the connection schematic diagram of the boost circuit.

[0032] Figure 14 is the connection schematic diagram of the voltage dividing circuit.

[0033] Figure 15 is the connection schematic diagram of the 3.3V voltage stabilization circuit.

[0034] Figure 16 is the connection schematic diagram of the AD conversion circuit module.

[0035] Figure 17 is the connection schematic diagram of the power conversion circuit.

[0036] Figure 18 is the connection schematic diagram of the signal transmission circuit.

[0037] Figure 19 is the connection schematic diagram of the host computer.

[0038] The reference numerals in the figure are: 1. outer frame; 2. inner frame; 3. pressing and automatic rebound part; 301. bottom plate; 302. detection platform; 4. main support frame; 5. guide rail; 6. slider; 7. laser ranging module; 8. buffer; 9. lithium battery; 10. microcontroller; 11. frequency detection module; 12. power switch; 13. charging interface; 14. hook spring; 15. pressure detection module. Detailed implementation manners

[0039] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0040] To better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings of the specification and specific implementation manners.

[0041] Referring to Figure 1-19 , a portable calibration device for a cardiopulmonary resuscitation machine includes: an outer frame 1, an inner frame 2, and a pressing and automatic rebound part 3. The inner frame 2 is installed inside the outer frame 1, the pressing and automatic rebound part 3 is integrated inside the inner frame 2, the bottom of the pressing and automatic rebound part 3 is connected to one end of the outer frame 1, and the top is flush with the other end of the outer frame 1; The pressing and automatic rebound part 3 includes: A laser ranging module 7, installed on the pressing and automatic rebound part 3, for measuring the pressing depth of the cardiopulmonary resuscitation machine; A pressure detection module 15, installed on the pressing and automatic rebound part 3, and the pressure detection module 15 is used to detect the pressing force during the pressing of the cardiopulmonary resuscitation machine; A frequency detection module 11, installed on the pressing and automatic rebound part 3, for measuring the pressing frequency of the cardiopulmonary resuscitation machine; An AD conversion circuit module, which is used to convert and process the analog signals collected by the laser ranging module 7, the frequency detection module 11, and the pressure detection module 15; A power conversion circuit module, which is used to provide stable power for the entire calibration device.

[0042] The outer frame 1, the inner frame 2, and the pressing and automatic rebound part 3 cooperate with each other to form a stable structure. The laser ranging, frequency detection, AD conversion, and power conversion circuit modules inside the pressing and automatic rebound part 3 work together to accurately measure the pressing depth and frequency of the cardiopulmonary resuscitation machine, convert and process the collected analog signals, and provide stable power for the entire device, providing key support for the calibration work.

[0043] The pressing and automatic rebound part 3 further includes: A bottom plate 301, which is installed inside the outer frame 1; A detection platform 302, which is arranged directly above the bottom plate 301; A main support frame 4, the main support frame 4 is located between the bottom plate 301 and the detection platform 302, and the main support frame 4 is composed of two groups of connecting rods that are cross-rotationally connected, and the cross-connection point is at the center of the long direction of the connecting rod; There are four guide rails 5, and the four guide rails 5 are respectively arranged on the bottom plate 301 and the detection platform 302, and the guide rails 5 on the bottom plate 301 and the detection platform 302 are symmetric about the center points of the bottom plate 301 and the detection platform 302; A slider 6 is connected to the guide rail 5, and the slider 6 is rotationally connected to one end of the connecting rod; A buffer 8, which is installed on the detection platform 302 through a buffer bracket, and the buffer 8 is used to avoid vibration and noise; A hook spring 14, one end of which is connected to the detection platform 302 through a hook spring bracket, and the other end is connected to one end of the connecting rod on the detection platform 302.

[0044] The above structure realizes the effect of structural optimization and function guarantee of the pressing and automatic rebound part 3; the structure composed of the bottom plate 301, the detection platform 302, the main support frame 4, the guide rail 5, the slider 6, the buffer 8 and the hook spring 14 is similar to a lifting platform structure, which has the characteristics of stable pressing and descending height, accurate rebound position, long service life, and small deformation of the hook spring 14 and is not easy to be damaged. By using the cross-rotationally connected main support frame 4 and the symmetrically distributed guide rail 5 and slider 6, the pressing and automatic rebound part 3 can be flexibly adapted when pressing different specifications of cardiopulmonary resuscitation machines. The hook spring 14 realizes automatic rebound, and the buffer 8 effectively avoids vibration and noise, ensuring the accuracy and stability of the measurement.

[0045] A lithium battery 9 and a microcontroller 10 are also installed inside the pressing and automatic rebound part 3.

[0046] It realizes the effect of providing a mobile power source and core control ability for the calibration device; the lithium battery 9 provides power support for the device to ensure that it can work normally without an external power source; the microcontroller 10 is responsible for data processing, analysis and the coordinated control of each module to ensure the orderly progress of the entire calibration process.

[0047] A power switch 12 and a charging interface 13 are provided on the inner frame 2. The power switch 12 is used to control the power on and off of the entire calibration device, and the charging interface 13 is used to connect an external power source to charge the lithium battery 9 installed inside the pressing and automatic rebound part 3.

[0048] The convenient control of the power supply of the calibration device and the effect of safe charging are achieved; the power switch 12 controls the on and off of the power supply, facilitating the operator to turn on and off the device; the charging interface 13 is connected to an external power supply to charge the lithium battery 9, and has functions of waterproof and dustproof, supports fast charging and automatically detects the battery status, ensuring the safety of the power supply and the charging efficiency.

[0049] An ADR433B chip, an AD5542C chip and an OP97A chip are provided in the AD conversion circuit module; pin 2 of the ADR433B chip is connected to the VCC power supply, and at the same time is grounded through the parallel-connected capacitors C1 and C2 to play a filtering role to ensure the stability of the input power supply; pin 4 is directly grounded, pin 6 outputs the reference voltage VREF, on the one hand, it is connected to capacitors C3 and C4 and then grounded to further stabilize the reference voltage; on the other hand, it is connected to pin 6 of the AD5542C chip to provide a reference voltage for the AD5542C; pin 5 is left unconnected, and pins 1, 3, 7, and 8 are empty pins and not connected; pin 14 of the AD5542C chip is connected to the VCC power supply, pins 12, 3, and 4 are directly grounded, which are respectively used for the connection of digital ground and analog ground to ensure that the digital and analog circuits do not interfere with each other; pin 6 is connected to the reference voltage VREF output by the ADR433B chip; pin 9 is an empty pin and not connected; pin 8 is connected to the clock signal CLK1-1, pin 7 is connected to the chip select signal CS1-1, pin 10 is used for inputting data, and pin 11 is used for loading data control; pin 2 outputs the converted analog signal and is connected to pin 3 of the OP97A chip; pins 1 and 13 cooperate with the OP97A chip to form a feedback circuit; pin 7 of the OP97A chip is connected to the VDD power supply, and pin 4 is connected to the VSS; pin 3 receives the analog signal output by the AD5542C, and pin 6 outputs the processed signal.

[0050] The effect of accurate analog signal conversion and processing is achieved; the ADR433B chip, the AD5542C chip and the OP97A chip cooperate with each other. The ADR433B provides a stable reference voltage, the AD5542C converts the analog signal into a digital signal, and the OP97A processes the converted signal, ensuring the accuracy and stability of the signal conversion and providing reliable data for subsequent data processing.

[0051] The power conversion circuit module is provided with a CH5619 chip. Pin 5 of the CH5619 chip is connected to the +12V power supply filtered by the parallel capacitors CIN and C1 to provide an input voltage for the chip; pin 1 is directly grounded to ensure a stable reference potential for the circuit; pin 3 is connected to a switch signal used to control whether the chip works. When a high-level signal is received at this pin, the chip is turned on, and a low level turns it off; pin 4 outputs a switch signal, which is connected to an inductor L. Through the energy storage and release characteristics of the inductor, in cooperation with the diode D1 and the output capacitor COUT, the voltage is converted and a stable 5V / 5A power supply is output to the load; the resistors R1 and R2 form a feedback circuit, which is connected to the inside of the chip to adjust the output voltage. The CFF capacitor is connected in parallel with R2 to play a role in frequency compensation, improving the stability and dynamic response performance of the circuit.

[0052] The effect of providing a stable and suitable power supply for the calibration device is achieved; the CH5619 chip converts the +12V power supply into a stable 5V / 5A power supply. Through measures such as filtering, feedback regulation, and frequency compensation, the stability and dynamic response performance of the power supply are ensured, meeting the power consumption requirements of each module of the device.

[0053] The microcontroller 10 is also provided with a data storage module, which is used to store the cardiopulmonary resuscitation machine compression depth data collected by the laser ranging module 7, the pressure data detected by the pressure detection module 15, the compression frequency data obtained by the compression frequency detection module 11, and the digital signal data converted by the AD conversion circuit module.

[0054] The above structure realizes the effect of data storage and management; the data storage module in the microcontroller 10 stores the data collected by the laser ranging module 7 and the compression frequency detection module 11, as well as the digital signal data converted by the AD conversion circuit module, facilitating subsequent analysis, query, and traceability of the calibration data, providing data support for the evaluation of the calibration results. The pressure detection module 15 uses a thin-film pressure sensor, and a resistive pressure sensor can also be used.

[0055] The pressing automatic rebound part 3 is also provided with a communication module. The communication module is provided with a USR-WIFI232 chip. The pin 16 of the USR-WIFI232 chip is connected to a 3.3V power supply to supply power to the module. At the same time, it is grounded through a capacitor C4 to play a filtering role and ensure the stability of the power supply. The pins 17 and 18 are grounded and are respectively used for connecting the digital ground and the isolation ground. The pin 2 is connected to the power supply to supply power to the internal digital circuit. The pins 4 and 5 are the serial port sending and receiving pins respectively. The pin 4 is connected to the serial port receiving end of an external device through a resistor R31, and the pin 5 is connected to the serial port sending end of the external device through a resistor R34 to realize the transmission of serial communication data. The pins 3, 6, and 9 are function pins and are respectively connected to an external control circuit or a pull-up / pull-down resistor. The pin 6 is a reset pin, which is valid at a low level and is used to reset the module. The pin 9 is connected to an external circuit and can realize the reset control of the WIFI function. The pins 7 and 8 are serial port hardware flow control pins. The pin 10 is a WIFI connection status indication pin and can be connected to an indicator light circuit to display the WIFI connection status of the module. The pin 11 is a module busy status indication pin and can be connected to a relevant circuit to judge whether the module is in a busy state.

[0056] The effects of data communication and status monitoring between the calibration device and an external device are achieved. The USR-WIFI232 chip in the communication module realizes the transmission of serial communication data. The function pins can perform operations such as reset and control. The pins 10 and 11 respectively indicate the WIFI connection status and the status of the module, which is convenient for the operator to understand the working status of the communication module and ensure the smooth and stable transmission of data.

[0057] The microcontroller 10 is provided with an MCU chip, a 5V voltage stabilization circuit, a 3.3V voltage stabilization circuit, a boost circuit, and a voltage division circuit.

[0058] The effects of power management and stable operation within the microcontroller 10 are achieved. The MCU chip, the 5V voltage stabilization circuit, the 3.3V voltage stabilization circuit, the boost circuit, and the voltage division circuit work together. The voltage stabilization circuit ensures the stability of the working voltage of the MCU chip. The boost circuit and the voltage division circuit provide appropriate working voltages for other modules, ensuring the stable operation of the microcontroller 10 and the entire device.

[0059] The laser ranging module 7 is installed between two sliders 6 on the bottom plate 301, and the laser ranging module 7 slides along with the two sliders 6 on the bottom plate 301.

[0060] The effects of accurate measurement of the laser ranging module 7 are achieved. By installing the laser ranging module 7 between two sliders 6 on the bottom plate 301 and making it slide along with the sliders 6, the change in the pressing depth can be measured more accurately, ensuring the accuracy of the measurement position and the precision of the measurement result.

[0061] During use, first, move the device to the side of the cardiopulmonary resuscitator that needs to be calibrated by using the pull handle and universal wheels on the outer frame 1, and fix the device to the cardiopulmonary resuscitator by using the strap buckle; turn on the power switch 12 on the inner frame 2, and press the lithium battery 9 in the automatic rebound part 3 to supply power to the whole device. At this time, the microcontroller 10 starts to initialize each module; then, fit the pressing head of the cardiopulmonary resuscitator to the detection platform 302 of the pressing automatic rebound part 3. The bottom plate 301, detection platform 302, main support frame 4, guide rail 5, slider 6, buffer 8 and hook spring 14 of the pressing automatic rebound part 3 work together. The cross-rotating connection of the main support frame 4 and the symmetrical distribution of the guide rail 5 and slider 6 enable the pressing automatic rebound part 3 to adapt to the pressing of cardiopulmonary resuscitators of different specifications. The hook spring 14 realizes automatic rebound, and the buffer 8 avoids vibration and noise; during the pressing process, the laser ranging module 7 installed between the two sliders 6 on the bottom plate 301 slides along with the slider 6 to accurately measure the pressing depth, the frequency detection module 11 accurately measures the pressing frequency, and the pressure detection module 15 detects the pressing force when the cardiopulmonary resuscitator presses. The collected analog signal is transmitted to the AD conversion circuit module; the ADR433B chip, AD5542C chip and OP97A chip in the AD conversion circuit module cooperate with each other. The ADR433B chip provides a stable reference voltage, the AD5542C chip converts the analog signal into a digital signal, and the OP97A chip processes the converted signal; at the same time, the CH5619 chip in the power conversion circuit module converts the +12V power supply filtered by the parallel capacitors CIN and C1 into a stable 5V / 5A power supply to supply power to the whole device; the microcontroller 10 analyzes and processes the processed digital signal, and stores the pressing depth data, pressing frequency data and the digital signal data after AD conversion into the internal data storage module; in addition, the communication module in the pressing automatic rebound part 3 realizes data communication with external devices through the USR-WIFI232 chip. The pin 4 and pin 5 of the USR-WIFI232 chip are respectively used for data transmission with the serial port of the external device through the resistors R31 and R34, and the pin 10 and pin 11 respectively indicate the WIFI connection status and the module busy status; finally, the data is wirelessly transmitted to the upper computer. The upper computer uses VisualTFT to distinguish the transmitted data, display the data in real-time graphically, record the relevant data during the test, and control each sub-module to execute the specified functions. At the same time, the upper computer supports online calibration of parameters, and can send the calibrated parameters to the lower computer through instructions to realize the function of online real-time debugging of the device. At the same time, the upper control also performs specified operations on the data and generates a report in a specified format for display.

[0062] The figures shown in the accompanying drawings are example figures, and their purpose is only to more intuitively display the key structures and connection relationships of a portable cardiopulmonary resuscitation machine calibration device of the present invention; in actual applications, the appearance and size of the device can be adjusted and optimized according to specific requirements.

[0063] The entire working process of the portable cardiopulmonary resuscitation machine calibration device can be divided into a preparation stage, a data acquisition stage, a signal processing stage, and a data management stage. Each stage works in coordination through a mechanical structure and an electronic module, as follows: I. Preparation stage: Device deployment and initialization 1. Physical connection and movement: Use the pull handle and universal wheels on the outer frame 1 to move the device next to the cardiopulmonary resuscitation machine, and fix the device to the cardiopulmonary resuscitation machine through the strap buckle to ensure the stability of the device during the calibration process.

[0064] 2. Power-on and module initialization: Press the power switch 12 on the inner frame 2, and the lithium battery 9 (installed in the pressing automatic rebound part 3) powers the device. The microcontroller 10 starts and initializes the laser ranging module 7, the frequency detection module 11, the AD conversion circuit module, and the communication module in sequence to ensure that each module enters the working state.

[0065] II. Data acquisition stage: Real-time measurement of pressing parameters 1. The mechanical structure responds to the pressing action: The pressing head of the cardiopulmonary resuscitation machine fits with the detection platform 302 of the pressing automatic rebound part 3. When pressing, the main support frame 4 cooperates with the guide rail 5 and the slider 6 structures, so that the detection platform 302 moves stably downward in the vertical direction to adapt to the pressure of pressing heads of different specifications; the hook spring 14 realizes automatic rebound after pressing through elastic force, and the buffer 8 reduces vibration and noise to ensure a stable measurement environment.

[0066] 2. Multi-parameter synchronous acquisition: The laser ranging module 7 is installed between the sliders 6 of the bottom plate 301 and slides with the slider 6 to measure the pressing depth in real time, with an accuracy of up to millimeter level; the frequency detection module 11 monitors the reciprocating motion frequency of the pressing head and records the number of presses per minute; the pressure detection module 15 detects the pressure value applied by the pressing head, which is realized through a thin-film pressure sensor or a resistive pressure sensor.

[0067] III. Signal processing stage: Analog signal digitization and data processing 1. Signal processing of the AD conversion circuit module: The analog signals output by the laser ranging, frequency, and pressure modules are transmitted to the AD conversion circuit module: The ADR433B chip provides a stable reference voltage VREF, and after capacitor filtering, the signal reference is ensured to be stable; the AD5542C chip converts the analog signal into a digital signal, and controls the conversion timing through the clock signal CLK1-1 and the chip select signal CS1-1; the OP97A chip amplifies and filters the converted signal to reduce noise interference.

[0068] 2. Data Processing and Storage of Microcontroller 10: After receiving the digital signal, the microcontroller 10 stores the following data through the built-in data storage module (such as the W25Q64 chip): the original acquisition data of the pressing depth, frequency, and pressure; the digital signal data after AD conversion; and auxiliary information such as the time stamp during the calibration process. At the same time, the microcontroller 10 conducts a preliminary analysis of the data to determine whether it meets the calibration standard range.

[0069] IV. Data Management Stage: Wireless Transmission and Interaction with the Host Computer 1. Data Transmission of the Communication Module: The USR-WIFI232 chip in the pressing automatic rebound part 3 communicates with the microcontroller 10 through the serial port, converts the data into a wireless signal: Pins 10 (WIFI connection status indication) and 11 (module busy status indication) feedback the communication status in real time. The data is wirelessly transmitted to the host computer (such as a computer or a tablet).

[0070] 2. Function Realization of the Host Computer Software: The host computer uses VisualTFT software to realize the following functions: Real-time Display: Dynamically display the pressing depth, frequency, and pressure curves in the form of a chart to facilitate intuitive judgment of the parameter stability.

[0071] Data Recording: Store all the data during the calibration process and support query by dimensions such as time and device number.

[0072] Online Calibration: Send calibration parameters to the lower computer (microcontroller 10) through instructions to adjust the measurement accuracy of the device in real time.

[0073] Report Generation: Automatically generate a calibration report in a specified format, including measurement data, deviation analysis, calibration conclusion, etc.

[0074] V. Power Supply Guarantee: Power Supply Stability throughout the Process The power conversion circuit module converts the +12V power supply of the lithium battery 9 into a 5V / 5A stable power supply through the CH5619 chip to supply power to modules such as laser ranging and AD conversion: The parallel capacitors CIN and C1 are used for filtering, and the inductor L and the diode D1 cooperate for energy storage to ensure stable voltage output.

[0075] The feedback resistors R1, R2 and the CFF capacitor adjust the output voltage to avoid the influence of load fluctuations on the power supply quality.

[0076] The present invention covers any alternatives, modifications, equivalent methods, and solutions within the spirit and scope of the present invention. To enable the public to have a thorough understanding of the present invention, specific details have been described in detail in the preferred embodiments of the present invention above. However, those skilled in the art can fully understand the present invention even without the description of these details. Additionally, well-known methods, processes, procedures, components, and circuits, etc. have not been described in detail to avoid unnecessary confusion to the essence of the present invention.

[0077] The above description is only a preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A calibration device for a portable cardiopulmonary resuscitation machine, comprising an outer frame (1), an inner frame (2) and a pressing and automatic rebounding part (3), characterized in that: The inner frame (2) is installed inside the outer frame (1). The pressing and automatic rebounding part (3) is integrated inside the inner frame (2). The bottom of the pressing and automatic rebounding part (3) is connected to one end of the outer frame (1), and the top is flush with the other end of the outer frame (1). The pressing and automatic rebounding part (3) includes: A laser ranging module (7), installed on the pressing and automatic rebounding part (3), for measuring the pressing depth of the cardiopulmonary resuscitator; A pressure detection module (15), installed on the pressing and automatic rebounding part (3), and the pressure detection module (15) is used to detect the pressing force during the pressing of the cardiopulmonary resuscitator; A frequency detection module (11), installed on the pressing and automatic rebounding part (3), for measuring the pressing frequency of the cardiopulmonary resuscitator; An AD conversion circuit module, which is used to convert and process the analog signals collected by the laser ranging module (7), the frequency detection module (11), and the pressure detection module (15); A power conversion circuit module, which is used to provide a stable power supply for the entire calibration device.

2. The portable cardiopulmonary resuscitation machine calibration device according to claim 1, wherein: The pressing and automatic rebounding part (3) further includes: A bottom plate (301), installed inside the outer frame (1); A detection platform (302), arranged directly above the bottom plate (301); A main support frame (4), which is located between the bottom plate (301) and the detection platform (302), and the main support frame (4) is composed of two groups of connecting rods that are cross-rotationally connected, and the cross-connection point is at the center of the long direction of the connecting rod; Four guide rails (5), and the four guide rails (5) are respectively arranged on the bottom plate (301) and the detection platform (302). The guide rails (5) on the bottom plate (301) and the detection platform (302) are symmetric with respect to the center points of their bottom plate (301) and detection platform (302); A slider (6) is connected to the guide rail (5), and the slider (6) is rotationally connected to one end of the connecting rod; A buffer (8), installed on the detection platform (302) through a buffer support, and the buffer (8) is used to avoid vibration and noise; A hook spring (14), one end of which is connected to the detection platform (302) through a hook spring support, and the other end is connected to one end of the connecting rod on the detection platform (302).

3. The portable cardiopulmonary resuscitation machine calibration device according to claim 1, wherein: A lithium battery (9) and a microcontroller (10) are also installed inside the pressing and automatic rebounding part (3).

4. The portable cardiopulmonary resuscitation machine calibration device according to claim 3, characterized in that: A power switch (12) and a charging interface (13) are provided on the inner frame (2). The power switch (12) is used to control the power on and off of the entire calibration device, and the charging interface (13) is used to connect to an external power supply to charge the lithium battery (9).

5. The calibration device for a portable cardiopulmonary resuscitation machine according to claim 1, wherein: The AD conversion circuit module is provided with an ADR433B chip, an AD5542C chip, and an OP97A chip; Pin 2 of the ADR433B chip is connected to the VCC power supply and grounded through the parallel-connected capacitors C1 and C2 to play a filtering role and ensure the stability of the input power supply; Pin 4 is directly grounded, Pin 6 outputs the reference voltage VREF, which is connected to capacitors C3 and C4 and then grounded on the one hand to further stabilize the reference voltage; on the other hand, it is connected to Pin 6 of the AD5542C chip to provide a reference voltage for the AD5542C; Pin 5 is left floating and not connected, and Pins 1, 3, 7, and 8 are empty pins and not connected. Pin 14 of the AD5542C chip is connected to the VCC power supply, and Pins 12, 3, and 4 are directly grounded, which are used for the connection of digital ground and analog ground respectively to ensure that digital and analog circuits do not interfere with each other; Pin 6 is connected to the reference voltage VREF output by the ADR433B chip; Pin 9 is an empty pin and not connected; Pin 8 is connected to the clock signal CLK1-1, Pin 7 is connected to the chip select signal CS1-1, Pin 10 is used for inputting data, and Pin 11 is used for loading data control; Pin 2 outputs the converted analog signal and is connected to Pin 3 of the OP97A chip; Pins 1 and 13 cooperate with the OP97A chip to form a feedback circuit. Pin 7 of the OP97A chip is connected to the VDD power supply, and Pin 4 is connected to the VSS; Pin 3 receives the analog signal output by the AD5542C, and Pin 6 outputs the processed signal.

6. The portable cardiopulmonary resuscitation machine calibration device according to claim 1, characterized in that: The power conversion circuit module is provided with a CH5619 chip. Pin 5 of the CH5619 chip is connected to the +12V power supply filtered by the parallel-connected capacitors CIN and C1 to provide an input voltage for the chip; Pin 1 is directly grounded to ensure a stable reference potential for the circuit; Pin 3 is connected to a switch signal to control whether the chip works. When a high-level signal is received at this pin, the chip is turned on, and a low level turns it off; Pin 4 outputs a switch signal and is connected to an inductor L. Through the energy storage and release characteristics of the inductor, cooperating with a diode D1 and an output capacitor COUT, the voltage is converted and stably outputs a 5V / 5A power supply to the load; Resistors R1 and R2 form a feedback circuit and are connected to the inside of the chip to adjust the output voltage. The CFF capacitor is connected in parallel with R2 to play a role in frequency compensation, improving the stability and dynamic response performance of the circuit.

7. The calibration device for a portable cardiopulmonary resuscitation machine according to claim 3, characterized in that: The microcontroller (10) is also provided with a data storage module, which is used to store the cardiopulmonary resuscitation machine compression depth data collected by the laser ranging module (7), the pressure data detected by the pressure detection module (15), the compression frequency data obtained by the compression frequency detection module (11), and the digital signal data converted by the AD conversion circuit module.

8. The portable cardiopulmonary resuscitation machine calibration device according to claim 1, wherein: A communication module is further provided inside the pressing and automatic rebound part (3). A USR-WIFI232 chip is provided inside the communication module. Pin 16 of the USR-WIFI232 chip is connected to a 3.3V power supply to supply power to the module. At the same time, it is grounded through a capacitor C4 to play a filtering role and ensure the stability of the power supply. Pin 17 and pin 18 are grounded and are respectively used for connecting digital ground and isolated ground. Pin 2 is connected to the power supply to supply power to the internal digital circuit. Pins 4 and 5 are respectively the serial port transmit and receive pins. Pin 4 is connected to the serial port receive end of an external device through a resistor R31, and pin 5 is connected to the serial port transmit end of the external device through a resistor R34 to realize the transmission of serial communication data; Pins 3, 6, and 9 are function pins and are respectively connected to an external control circuit or a pull-up / pull-down resistor; pin 6 is a reset pin, which is valid at a low level and is used to reset the module; pin 9 is connected to an external circuit and can realize the reset control of the WIFI function; pins 7 and 8 are serial port hardware flow control pins; Pin 10 is a WIFI connection status indication pin and can be connected to an indicator light circuit to display the WIFI connection status of the module; pin 11 is a module busy status indication pin and can be connected to a relevant circuit to judge whether the module is in a busy state.

9. The portable cardiopulmonary resuscitation machine calibration device according to claim 3, wherein: The microcontroller (10) is internally provided with an MCU chip, a 5V voltage stabilization circuit, a 3.3V voltage stabilization circuit, a boost circuit, and a voltage division circuit.

10. The portable cardiopulmonary resuscitation machine calibration device according to claim 1, characterized in that: The laser ranging module (7) is installed between two sliders (6) on the bottom plate (301), and the laser ranging module (7) slides along with the two sliders (6) on the bottom plate (301).

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