Respiratory simulation signal generating apparatus and method

Abstract

The present invention provides a respiratory simulation signal generation device and method. The respiratory simulation signal generation device includes: a first multi-channel analog switch, a second multi-channel analog switch, an adjustment module, and a processing module; the first multi-channel analog switch, the second multi-channel analog switch, the adjustment module, the processing module, and the output module are connected in sequence; the first multi-channel analog switch is used to set a base impedance; the second multi-channel analog switch is used to set a variable base impedance; the adjustment module is used to periodically adjust the variable base impedance of the second multi-channel analog switch; the processing module adds an interference source according to the respiratory simulation signal to obtain a respiratory simulation signal. The technical solution of the present invention realizes the generation of a full-coverage signal of respiratory rhythm and the superposition of interference signals, and at the same time realizes the change mechanism of the respiratory rate, which is suitable for better testing and verification of the respiratory rate and respiratory function.

Description

Technical Field

[0001] The present invention relates to the technical field of monitors, and particularly to a respiratory analog signal generating device and method. Background Art

[0002] Respiratory monitoring is one of the basic monitoring parameters of a multi-parameter monitoring system. Respiratory monitoring technology usually adopts the principle based on impedance method, and its evaluation indexes are mainly respiratory rate and respiratory sensitivity. Usually, the measurement range of respiratory rate includes 5 - 120 rpm, and the sensitivity is 0.2 - 3 ohms. However, in practice, it is necessary to evaluate the performance and function of the respiratory rate. Existing simulators can only generate 8 - 120 rpm, and there is no generation of respiratory signals with interference.

[0003] Currently, most of the respiratory analog signal generating devices based on the impedance method use a method combining base impedance and variable base impedance. First, the selection of base impedance is achieved through an analog switch: such as 3K, 2K, 1K, 500, 200; then the selection of variable base impedance is carried out: 3, 1, 0.5, 0.3, 0.2; and then the respiratory rate is set, such as 120, 100, 80, 20, 10, 8 rpm, etc. However, it is still impossible to set the respiratory rate below 8 rpm and above 120 rpm. Summary of the Invention

[0004] The main purpose of the embodiments of the present invention is to propose a respiratory analog signal generating device and method, which improve the test range of the respiratory rate.

[0005] One aspect of the present invention provides a respiratory analog signal generating device, which is characterized by including a first multi-channel analog switch, a second multi-channel analog switch, an adjustment module, and a processing module;

[0006] The first multi-channel analog switch, the second multi-channel analog switch, the adjustment module, the processing module, and the output module are connected in sequence;

[0007] The first multi-channel analog switch is used to set the base impedance;

[0008] The second multi-channel analog switch is used to set the variable base impedance;

[0009] The adjustment module is used to periodically adjust the variable base impedance of the second multi-channel analog switch;

[0010] The processing module adds an interference source according to the setting of the respiratory analog signal to obtain a respiratory analog signal.

[0011] According to the respiratory simulation signal generating device described above, it further includes an input module and an output module. The input module is connected to the first multi-channel analog switch. The input module is used to perform the driving input of the respiratory signal and the input of the detection signal; the output module is used to output the respiratory simulation signal and the detection signal.

[0012] The input module and the output module are used to configure an external test port and a constant current source for the variable base impedance and the base resistance, so that the respiratory simulation signal generating device can perform external testing and metering.

[0013] According to the respiratory simulation signal generating device described above, the first multi-channel analog switch includes:

[0014] A multi-channel analog switch is used to set the base impedance, and the set range of the base impedance includes 3K, 2K, 1K, 500, and 200.

[0015] According to the respiratory simulation signal generating device described above, the second multi-channel analog switch includes:

[0016] The variable base impedance is set by using a multi-channel CMOS transistor method. The variable base impedance includes 3, 1, 0.5, 0.3, and 0.2. The second multi-channel analog switch uses a device with a low on-resistance.

[0017] According to the respiratory simulation signal generating device described above, the adjustment module includes:

[0018] The variable base impedance of the second multi-channel analog switch is continuously and regularly adjusted through a DA output method.

[0019] According to the respiratory simulation signal generating device described above, the processing includes:

[0020] According to the requirements of the respiratory simulation signal, at least one of the following processes is performed:

[0021] Set the base impedance of the first multi-channel analog module, continuously adjust the variable base impedance of the second multi-channel analog module, and obtain the respiratory rate of the normal respiratory signal;

[0022] Select an interference signal, superimpose the normal respiratory signal and the interference signal, and obtain a respiratory simulation signal.

[0023] According to the respiratory simulation signal generating device described above, the range of the respiratory rate is 5 - 130 rpm.

[0024] The technical solution of the present invention also discloses a method for generating a respiratory simulation signal, which is characterized in that the method includes:

[0025] According to the requirements of the breathing simulation signal, set the base impedance and variable base impedance to obtain a normal breathing signal;

[0026] Periodically adjust the variable base impedance to obtain the breathing rate of the normal breathing signal;

[0027] Add an interference signal to the normal breathing signal and perform superposition to obtain a breathing simulation signal.

[0028] According to the breathing simulation signal generating device described above, the interference signal is generated by calling the breathing interference signal in the database.

[0029] The additional aspects and advantages of the present invention will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0031] Figure 1 is a block diagram of the device according to an embodiment of the present invention.

[0032] Figure 2 is a schematic diagram of the analog resistor architecture according to an embodiment of the present invention.

[0033] Figure 3 is a circuit schematic diagram of the breathing simulation signal according to an embodiment of the present invention.

[0034] Figure 4 is a schematic diagram of the breathing simulation signal generation mechanism process according to an embodiment of the present invention.

[0035] Figure 5 is a schematic diagram of the breathing waveform generation process according to an embodiment of the present invention. Detailed Embodiments

[0036] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. In the following description, suffixes such as "module", "component", or "unit" used to denote elements are only for the convenience of describing the present invention and have no specific meaning in themselves. Therefore, "module", "component", or "unit" can be used interchangeably. "First", "second", etc. are only used to distinguish technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features. In the following description, the consecutive numbering of method steps is for the convenience of review and understanding. Considering the overall technical solution of the present invention and the logical relationship between each step, adjusting the execution order between steps will not affect the technical effect achieved by the technical solution of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention.

[0037] Figure 1 is a block diagram of the device according to an embodiment of the present invention. It includes a first multi-channel analog switch, a second multi-channel analog switch, an adjustment module, a processing module, and an output module connected in sequence; the first multi-channel analog switch is used to set the base impedance; the second multi-channel analog switch is used to set the variable base impedance; the adjustment module is used to periodically adjust the variable base impedance of the second multi-channel analog switch; the processing module sets and adds a noise source according to the breathing simulation signal to obtain the breathing simulation signal.

[0038] In some embodiments, referring to Figure 2 , the first multi-channel analog switch therein is a multi-channel analog switch of multiple parallel resistor devices, which is used to generate a fixed resistance, for example, to achieve the base impedance settings of 3K, 2K, 1K, 500, and 200.

[0039] In some embodiments, referring to Figure 2 , the second multi-channel analog switch is based on the variable base impedance setting of multiple CMOS transistors. For example, it can achieve the variable base impedance settings of 3, 1, 0.5, 0.3, and 0.20. Since there is a on-resistance in the analog switch, it is necessary to select devices with low on-resistance.

[0040] In some embodiments, the adjustment module therein is based on the DA output and the continuously adjustable function of the variable impedance in parallel with the CMOS transistors: setting the variable resistance of the above-mentioned first multi-channel analog switch and the second multi-channel analog switch in five variable impedance ranges to be continuously and regularly adjusted, so as to achieve a periodic change of the variable resistance.

[0041] In some embodiments, the processing module implements the above-mentioned variable resistance period to be equal to the set respiration rate period, where the period range reaches 5 and 130 rpm, ensuring coverage of 0 - 150 rpm. Meanwhile, during the change of the variable resistance period, interference sources are added, which is achieved through appropriate algorithms, and there are signal sources capable of generating various respiration interference signals to implement tests with more functions.

[0042] In some embodiments, the device of this embodiment further includes an input module and an output module. The input module is connected to the first multi-channel analog switch. The input module is used to perform the driving input of the respiration signal and the input of the detection signal; the output module is used to output the respiration analog signal and the detection signal; the input module and the output module are used to configure the external test port and the constant current source for the variable base impedance and the base resistance, so that the respiration analog signal generating device can perform external tests and measurements.

[0043] Examples are obtained with reference to Figure 3 the circuit schematic diagram of the respiration analog signal shown. Among them

[0044] 1) U2 and U3 are multiple analog switches, which complete the selection and setting of the base resistance;

[0045] 2) Q1 and Q2 are CMOS transistors, and the settings of variable resistances such as 3 and 1 are completed through the I / O ports of U1 (microprocessor);

[0046] 3) Q11 and Q12 are CMOS transistors, and the generation of dynamic variable resistances from 3 to 0 and 1 to 0 is completed through the PWM ports of U1 (microprocessor).

[0047] 4) U4 and U5 are operational amplifiers (op amps), which complete the driving input of the respiration signal and the input of the detection signal, called Resp+; U6 and U7 are operational amplifiers, which complete the driving input of the respiration signal and the output of the detection signal, called Resp-.

[0048] Figure 4 is a schematic diagram of the process flow of the respiration analog signal generation mechanism according to the embodiments of the present invention. Its process includes:

[0049] According to the requirements of the respiration analog signal, set the base impedance and the variable base impedance to obtain a normal respiration signal;

[0050] Periodically adjust the variable base impedance to obtain the respiration rate of the normal respiration signal;

[0051] Add interference signals to the normal respiration signal and perform superposition to obtain the respiration analog signal.

[0052] Figure 5 is a schematic diagram of the respiration waveform generation process according to the embodiments of the present invention. It includes obtaining the respiration analog signal through signal superposition of the respiration interference signal based on the database and the PMW signal modulated by the exponential function.

[0053] Through the technical solution of the present invention, it has at least the following beneficial effects: It realizes the generation of full-coverage signals of respiratory rhythm and the superposition of interference signals, and at the same time realizes the change mechanism of respiratory rate, which is suitable for better testing and verification of respiratory rate and respiratory function. Testing in the full respiratory rate range; more comprehensive testing of respiratory function, and it can also test, such as response time, anti-interference ability, etc.

[0054] In addition, although the present invention has been described in the context of functional modules, it should be understood that, unless otherwise stated to the contrary, one or more of the functions and / or features described may be integrated in a single physical device and / or software module, or one or more functions and / or features may be implemented in separate physical devices or software modules. It can also be understood that a detailed discussion of the actual implementation of each module is not necessary for understanding the present invention. More precisely, considering the attributes, functions and internal relationships of the various functional modules in the devices disclosed herein, the actual implementation of the modules will be understood within the ordinary skills of an engineer. Therefore, those skilled in the art can implement the present invention as set forth in the claims without undue experimentation. It can also be understood that the specific concepts disclosed are merely illustrative and are not intended to limit the scope of the present invention, which is determined by the full scope of the appended claims and their equivalents.

[0055] If the described function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or a part of this technical solution can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. And the aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks or optical discs that can store program codes.

[0056] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a definable sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or used in conjunction with these instruction execution systems, apparatuses, or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0057] More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer diskette (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpretation, or other suitable processing as necessary, and then stored in a computer memory.

[0058] It should be understood that various parts of the present invention can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits with logic gate circuits for implementing logical functions on data signals, application-specific integrated circuits with suitable combinational logic gate circuits, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0059] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc., means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0060] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

[0061] The above has specifically described the preferred embodiments of the present invention. However, the present invention is not limited to the described embodiments. Those skilled in the art can also make various equivalent deformations or substitutions without violating the spirit of the present invention, and these equivalent deformations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A respiratory simulation signal generating device, characterized in that, It includes a first multi-channel analog switch, a second multi-channel analog switch, an adjustment module and a processing module; The first multi-channel analog switch, the second multi-channel analog switch, the adjustment module, the processing module and the output module are connected in sequence; The first multi-channel analog switch is used to set the base impedance; The second multi-channel analog switch is used to set the variable base impedance; The adjustment module is used to periodically adjust the variable base impedance of the second multi-channel analog switch; The processing module sets and adds a disturbance source according to the breathing simulation signal to obtain the breathing simulation signal; The adjustment module includes: A setting for continuously and regularly adjusting the variable base impedance of the second multi-channel analog switch by means of DA output; The processing module includes: According to the requirements of the breathing simulation signal, perform at least one of the following processes: Set the base impedance of the first multi-channel analog switch, continuously adjust the variable base impedance of the second multi-channel analog switch, and obtain the breathing rate of the normal breathing signal; Select a disturbance signal, superimpose the normal breathing signal and the disturbance signal, and obtain the breathing simulation signal.

2. The respiratory simulation signal generating device according to claim 1, wherein It further includes an input module and an output module. The input module is connected to the first multi-channel analog switch. The input module is used to perform the driving input of the breathing signal and the input of the detection signal; the output module is used to output the breathing simulation signal and the detection signal; The input module and the output module are used to generate an external test port and a constant current source configuration for the variable base impedance and the base impedance, so that the breathing simulation signal generating device can perform external testing and metering.

3. The breathing simulation signal generating device according to claim 1, wherein The first multi-channel analog switch includes: Use a multi-channel analog switch to set the base impedance, and the base impedance setting range includes 3K, 2K, 1K, 500, 200.

4. The respiratory simulation signal generating device according to claim 1, wherein, The second multi-channel analog switch includes: Perform variable base impedance setting in a multi-channel CMOS transistor manner. The variable base impedance includes 3, 1, 0.5, 0.3, 0.

2. The second multi-channel analog switch uses a device with a low on-resistance.

5. The respiratory simulation signal generating device according to claim 1, wherein The range of the breathing rate is 5 - 130 rpm.

6. A method for generating a respiratory simulation signal of the device according to any one of claims 1-5, characterized in that, The method includes: According to the requirements of the breathing simulation signal, set the base impedance and the variable base impedance to obtain the normal breathing signal; Periodically adjust the variable base impedance to obtain the breathing rate of the normal breathing signal; Add a disturbance signal to the normal breathing signal and perform superposition to obtain the breathing simulation signal.

7. The method for generating a respiratory simulation signal according to claim 6, wherein The disturbance signal is generated by calling the breathing disturbance signal in the database.

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