Reflective blood oxygen saturation simulation device

Abstract

In the reflective oxygen saturation simulation device, the optical signal docking module is connected to the blood oxygen saturation probe of the external blood oxygen saturation device to be tested for optical signal docking; the optical signal docking module is provided with multiple optical signal channels, and the positions of the light source and the optical sensing device on the blood oxygen saturation probe of the external blood oxygen saturation device to be tested correspond one by one. The following steps are included: collecting the optical signal emitted by the external blood oxygen saturation device to be tested, and obtaining the corresponding photoelectric signal; performing signal processing on the photoelectric signal to obtain the optical signal amplitude information and the optical signal timing information; according to the optical signal amplitude information and the optical signal timing information of each light source, the light source in the blood oxygen saturation simulation device is controlled, and the optical signal of the corresponding amplitude and timing is output, which is used as the blood oxygen saturation simulation signal. The test efficiency is greatly improved, and it is also suitable for the simulation test of blood oxygen saturation devices and probes to be tested of different models from various manufacturers.

Description

Technical Field

[0001] The present application relates to the field of bioelectronic technology, and in particular to a testing device and a testing and evaluation method for a brain computer oxygen composite probe. Background Art

[0002] In the prior art, blood oxygen saturation monitoring equipment is mainly divided into two categories, namely pulse blood oxygen saturation monitoring equipment and tissue blood oxygen saturation monitoring equipment. In the prior art, pulse blood oxygen saturation monitoring equipment and tissue blood oxygen saturation monitoring equipment are both based on photoelectric detection methods for detection. The measurement of pulse blood oxygen saturation is mainly divided into transmission and reflection, while the measurement of tissue blood oxygen saturation is generally reflection. Pulse blood oxygen saturation monitoring equipment is usually equipped with at least two measuring light sources and at least one photoelectric light sensing device. Tissue blood oxygen saturation monitoring equipment is usually equipped with at least two measuring light sources and at least one photoelectric light sensing device, but most products have multiple photoelectric light sensing devices. Different equipment is equipped with corresponding blood oxygen saturation measurement probes, and the layout of the light source and photoelectric light sensing device on the blood oxygen saturation probe is also different.

[0003] As a type of medical device, pulse oximetry monitoring equipment and tissue oximetry monitoring equipment have higher requirements for measurement accuracy and reliability than conventional equipment. In order to ensure the measurement accuracy, production consistency, and accuracy during use of their products, regular maintenance and calibration are required. It is impractical to conduct relevant clinical trials in full for regular maintenance and calibration tests, and oximetry simulation devices are often used to simulate different measurement objects and full-scale range of oximetry saturation.

[0004] Moreover, whether it is a pulse oximetry or tissue oximetry monitoring device, different measurement objects and full-range oximetry tests are also required during the device development and test verification process.

[0005] Pulse oximetry is usually measured based on two sets of light signals, while tissue oxygen saturation is usually measured based on more sets of light signals. In addition, in the measurement of pulse oximetry, whether it is transmission or reflection, the light receiving device is near the light emitting device, usually within a radius of no more than 2 cm, and the photoelectric conversion data of a single-point light receiving device or a multi-point light receiving device within the same radius is synthesized into a single-point data sequence for corresponding calculations. For the measurement of tissue oxygen saturation, it is necessary to calculate the photoelectric conversion data of light receiving devices at at least two different radius distances from the light emitting device.

[0006] The blood oxygen saturation simulation device in the prior art is usually designed for pulse blood oxygen saturation monitoring equipment, and is therefore usually only suitable for testing the corresponding pulse blood oxygen saturation measurement device. The output mode of its blood oxygen saturation simulation signal is relatively fixed and not very flexible, making it difficult to be applied to the detection of tissue blood oxygen saturation measurement devices based on more groups of optical signals and more spatial layout positions.

[0007] The structural design of tissue oxygen saturation photoelectric sensing devices of different manufacturers is very different. The characteristics of the light sources used by different manufacturers are also different. The layout of the photoelectric sensing devices is also different. More importantly, different tissues have different absorption characteristics of light signals, and the timing relationship combination of light source signals and photoelectric detection signals is also different. How to design a tissue oxygen saturation simulation device that has a certain degree of self-adaptation and can be flexibly adapted to tissue oxygen saturation measurement devices of various manufacturers is a technical problem to be solved. Summary of the invention

[0008] The technical problem to be solved by the technical solution in the present application is to propose a method and device that can collect the optical signal emitted by an external blood oxygen saturation device to be tested, and output a blood oxygen saturation simulation signal according to the characteristics of the optical signal, which greatly improves the test efficiency and is also suitable for simulation testing of blood oxygen saturation devices and probes to be tested of different models from various manufacturers.

[0009] The technical solution of the present application to solve the above-mentioned problem is a blood oxygen saturation simulation method, comprising the following steps: collecting light signals emitted by an external blood oxygen saturation device to be tested to obtain corresponding photoelectric signals; performing signal processing on the photoelectric signals to obtain light signal amplitude information and light signal timing information emitted by multiple light sources on the external blood oxygen saturation device to be tested; the number of the multiple light sources is at least two; according to the light signal amplitude information and light signal timing information of each light source, controlling the light source in the blood oxygen saturation simulation device to output light signals with corresponding amplitude and timing, which are used as blood oxygen saturation simulation signals.

[0010] The above-mentioned blood oxygen saturation simulation method further includes the step of obtaining the optical band information corresponding to each optical signal before collecting the optical signal emitted by the external blood oxygen saturation device to be tested.

[0011] The above-mentioned blood oxygen saturation simulation method includes any one of the following technical features: TD1: According to the amplitude information and timing information of the light signals emitted by multiple light sources, the light band information corresponding to each light signal is obtained; TD2: The light sensing device includes an independent light sensing device; the independent light sensing device is used to detect the light signals of multiple light sources; the amplitude ratio of the photoelectric signals output by each light source is calculated, and the amplitude ratio of the electrical signals obtained by the light sources of each corresponding band on the light sensing device and its affiliated amplification circuit is calculated; when the deviation between the electrical signal amplitude ratio and the sensitivity ratio corresponding to the light of the corresponding band on the spectral response characteristic curve of the light sensing device is within the set deviation range, the light band information corresponding to the corresponding light signal is determined in combination with the spectral characteristic curve; TD3: The light sensing device is a light sensing device with multiple filter components attached with different light transmittance characteristics; the light sensing device outputs an electrical signal corresponding to the light band of each light source according to its own output characteristics, and the light band information corresponding to the corresponding light signal is determined according to the signal characteristics of the light sensing device.

[0012] The above-mentioned blood oxygen saturation simulation method also includes a step of acquiring tissue characteristic information; the tissue characteristic information includes the measurement object type and tissue type; the light source in the blood oxygen saturation simulation device selects a corresponding light attenuation model according to the tissue characteristic information, and outputs a light signal of corresponding amplitude and timing, which is used as a blood oxygen saturation simulation signal.

[0013] The above-mentioned blood oxygen saturation simulation method connects the optical signal emitted by the external blood oxygen saturation device to be tested through the optical signal docking module; a plurality of optical signal channels are arranged on the optical signal docking module, and the positions of the plurality of optical signal channels are used to correspond to the positions of the light source and the optical sensing device on the blood oxygen saturation probe of the external blood oxygen saturation device to be tested; each optical signal channel includes an optical isolation component and a light-transmitting channel; the optical isolation component is used to establish an independent optical signal channel between the light source of the blood oxygen saturation device to be tested and one or a group of multiple optical sensing devices concentrated in the blood oxygen saturation simulation device, or to establish an independent optical signal channel between an optical sensing device of the blood oxygen saturation device to be tested and the light source of the blood oxygen saturation simulation device; the light-transmitting channel is isolated by the optical isolation component, and an optical attenuation component is arranged in the light-transmitting channel.

[0014] The above-mentioned blood oxygen saturation simulation method includes any one of the following technical features: TA1: the cross-sectional area of ​​the optical signal channel is larger than the light-emitting area of ​​the light source; TA2: the cross-sectional area of ​​the optical signal channel is larger than the light-sensitive area of ​​the light-sensing device; TA3: the light attenuation component includes a light-transmitting material with specific light attenuation characteristics, and the light-transmitting material with specific light attenuation characteristics includes a structure prepared from a chemical mixture with specific light-transmitting characteristics or a light-transmitting sheet with specific light-transmitting characteristics; TA4: the light attenuation component also includes a light-homogenizing component, and the light-homogenizing component includes a lens or a lens combination or a film.

[0015] The technical solution of the present application to solve the above-mentioned problem can also be a testing method for a blood oxygen saturation measuring device, which obtains a blood oxygen saturation simulation signal based on the above-mentioned blood oxygen saturation simulation method; and tests the blood oxygen saturation measuring device based on the obtained blood oxygen saturation simulation signal.

[0016] The technical solution of the present application to solve the above-mentioned problem can also be a reflective blood oxygen saturation simulation device, including a main control module, a light detection and light driving module, and an optical signal docking module; the main control module and the light detection and light driving module are electrically connected; the optical signal docking module is used for optical signal docking between the reflective blood oxygen saturation simulation device and the blood oxygen saturation probe of an external blood oxygen saturation device to be tested; a plurality of optical signal channels are arranged on the optical signal docking module, and the positions of the plurality of optical signal channels are used to correspond to the positions of the light source and the optical sensing device on the blood oxygen saturation probe of the external blood oxygen saturation device to be tested.

[0017] In the reflective blood oxygen saturation simulation device, the light detection and light driving module includes a light signal detection module and a light signal output module; the light signal detection module includes a light sensing device and a light signal detection circuit; the main control module includes a light intensity calculation submodule, a light pattern recognition submodule, a light attenuation calculation submodule, and a light logic generation module; the light signal output module includes a light source group and a light source driving circuit; the number and position of the light sensing devices in the light sensing device are used to correspond to the number and position of the light sources on the blood oxygen saturation probe of the external blood oxygen saturation device to be tested; the light sensing device is electrically connected to the light signal detection circuit, and the light signal detection circuit is electrically connected to the main control module, and provides the main control module with a photoelectric signal corresponding to the input light signal; the main control module performs light intensity calculation through the light intensity calculation submodule and performs light pattern recognition through the light pattern recognition submodule according to the received photoelectric signal; and performs light attenuation calculation through the light attenuation calculation submodule according to the characteristics of the light source group and the tissue feature information, generates light logic through the light logic generation module, and outputs the light source driving circuit control signal to the light source driving circuit, and the light source driving circuit drives the light source group to output a light signal with a corresponding light band, light intensity and light timing.

[0018] The optical signal docking module is fixedly connected to the optical detection and optical drive module; the optical signal docking module and the optical detection and optical drive module are connected to form an integral removable and replaceable module.

[0019] The reflective blood oxygen saturation simulation device also includes any one of the following technical features: TB1: the light sensing device includes an independent light sensing device; the independent light sensing device is used to detect light signals of multiple light sources, and the main control module is used to distinguish different light band information of multiple light sources based on the photoelectric signals obtained by the light sensing device; TB2: the light sensing device is a light sensing device with multiple filter components attached with different light transmittance characteristics, and the multiple light sensing devices with multiple filter components attached with different light transmittance characteristics are used to physically distinguish different light band information of multiple light sources.

[0020] The reflective blood oxygen saturation simulation device also includes any one of the following technical features: TC1: It also includes a user interaction module, which is electrically connected to the main control module, and is used to obtain information from the outside; the acquired information includes the number of light sources, the band data of each light source, and the simulated tissue type; the simulated tissue type includes tissue types of different measurement objects, including neonatal cranial brain tissue, pediatric cranial brain tissue, adult cranial brain tissue, neonatal vascular tissue, pediatric vascular tissue, and adult vascular tissue; TC2: It also includes a data storage module, which is electrically connected to the main control module, and the data storage module provides the main control module with optical signal models for simulating different tissues.

[0021] Each optical signal channel on the optical signal docking module includes an optical isolation component and a light-transmitting channel; the optical isolation component is used to establish an independent optical signal channel between the light source and the optical sensing device; the light-transmitting channel is isolated by the optical isolation component, and a light attenuation component is arranged in the light-transmitting channel; and it also includes any one of the following technical features: TA1: the cross-sectional area of ​​the optical signal channel is larger than the light-emitting area of ​​the light source; TA2: the cross-sectional area of ​​the optical signal channel is larger than the light-sensitive area of ​​the optical sensing device; TA3: the light attenuation component includes a light-transmitting material with specific light attenuation characteristics, and the light-transmitting material with specific light attenuation characteristics includes a structure prepared from a chemical mixture with specific light-transmitting characteristics or a light-transmitting sheet with specific light-transmitting characteristics; TA4: the light attenuation component also includes a light-homogenizing component, and the light-homogenizing component includes a lens or a lens combination or a film.

[0022] One of the beneficial effects of the present application is that it collects light signals emitted by an external blood oxygen saturation device to be tested, and controls the output light signals according to the collected photoelectric signals, thereby greatly improving the scope of application of the blood oxygen saturation simulation method and device, and greatly improving the adaptability to different types of blood oxygen saturation devices.

[0023] One of the beneficial effects of the present application is that the optical band information corresponding to each optical signal is obtained, and the optical signals corresponding to each different optical band can be accurately output, thereby ensuring the accuracy of the simulation.

[0024] One of the beneficial effects of the present application is that if the blood oxygen saturation simulation device uses an independent light sensing device, the light band information corresponding to each light signal is obtained according to the light signal amplitude information and light signal timing information emitted by multiple light sources; the method and device are simplified, and the different light band information of each light signal can be obtained by signal processing, which is a cost-effective solution.

[0025] One of the beneficial effects of the present application is that if the blood oxygen saturation simulation device uses multiple light sensing devices with filter components attached with different light transmittance characteristics, on the premise that the light bands allowed to pass corresponding to the filter components with corresponding light transmittance characteristics are known, the light signals corresponding to the light of each band are distinguished by using the different electrical signal channels connected to the corresponding light sensing devices with filter components attached with different light transmittance characteristics, which is an efficient solution.

[0026] One of the beneficial effects of the present application is that tissue characteristic information is acquired, so that the blood oxygen saturation simulation method and device can provide corresponding tissue characteristic information according to different measurement object types and different tissue types, and output corresponding light signals.

[0027] One of the beneficial effects of the present application is that the optical signal docking module provides a structure that is compatible with different types of blood oxygen saturation probes, which facilitates adaptation to different probes and improves the adaptability of the blood oxygen saturation simulation method and device.

[0028] One of the beneficial effects of the present application is that the optical isolation components and the light-transmitting channels of each optical signal channel ensure the independence of the optical signals between the optical signal channels, avoiding interference to the same optical sensing device during the docking process of optical signals with far-difference positions. One of the beneficial effects of the present application is that a light attenuation component is provided in the light-transmitting channel, which can improve the adaptability space for different light intensities emitted by light sources of different external blood oxygen saturation devices to be tested, avoiding signal saturation during subsequent photoelectric signal detection in the blood oxygen saturation device; avoiding the signal processing accuracy affecting the subsequent optical pattern recognition due to signal saturation.

[0029] One of the beneficial effects of the present application is that the cross-sectional area of ​​the optical signal channel is larger than the light-emitting area of ​​the light source and the photosensitive area of ​​the photosensitive device, which can collect the original optical signal as much as possible and reduce the attenuation or change of the optical signal caused by the optical signal channel.

[0030] One of the beneficial effects of the present application is that the arrangement of different light attenuation components simulates different light attenuation characteristics as much as possible, making the optical signal closer to the real scene.

[0031] One of the beneficial effects of the present application is that the test method of the blood oxygen saturation measurement device, based on the above-mentioned blood oxygen saturation simulation method, can perform blood oxygen saturation testing within the full range, greatly improving the efficiency of the test. The cost of the test is greatly reduced. Clinical full-scale testing usually requires a blood gas analysis comparison experiment, which has good accuracy, but is very expensive, has a limited range of detectable measurements, and is very inefficient, and cannot be used in daily engineering practice.

[0032] One of the beneficial effects of the present application is that if the blood oxygen saturation simulation device uses an independent light sensing device, the light intensity calculation of the light intensity calculation submodule can obtain the light intensity information of the input light signal; the light pattern recognition of the light pattern recognition submodule can obtain the timing information of the input light signal, and can obtain the characteristics of the light signal from multiple dimensions, thereby providing basic signal parameters based on the object to be measured for blood oxygen saturation simulation.

[0033] One of the beneficial effects of the present application is that if the blood oxygen saturation simulation device uses multiple light sensing devices with filter components attached with different light transmittance characteristics, on the premise that the light bands allowed to pass corresponding to the filter components with corresponding light transmittance characteristics are known, the light signals corresponding to the light of each band are distinguished by using different electrical signal channels connected to the corresponding light sensing devices with filter components attached with different light transmittance characteristics.

[0034] One of the beneficial effects of the present application is that light attenuation calculation and light emission logic generation are performed based on the characteristics of the light source group and tissue characteristic information, so that the blood oxygen saturation simulation can perform more targeted feature simulation based on the tissue characteristic information, i.e., the measurement object type and tissue type, making the blood oxygen saturation simulation closer to the actual measurement scenario.

[0035] One of the beneficial effects of the present application is that the optical signal docking module and the optical detection and optical driving module are connected to form an integrally removable and replaceable module. In the case of complex changes in the probe form, the integrally removable and replaceable module can be replaced to improve the application scope of the reflective blood oxygen saturation simulation device.

[0036] One of the beneficial effects of the present application is that a plurality of light sensing devices attached with filter components of different light transmittance characteristics are used to quickly detect light signals of different wavelengths, and have a targeted recognition capability for light signals of a specific wavelength, thereby improving the ability to recognize light sources.

[0037] One of the beneficial effects of the present application is that the user interaction module obtains information from the outside; the information obtained includes the number of light sources, the band data of each light source, and the simulated tissue type, which provides a multi-dimensional reference benchmark for the blood oxygen saturation simulation, making the blood oxygen saturation simulation closer to the actual measurement scenario.

[0038] One of the beneficial effects of the present application is that the data storage module provides the main control module with optical signal models for simulating different tissues. These model data improve the efficiency of blood oxygen saturation simulation. For more complex tissue features and more measurement objects, blood oxygen saturation simulation can be efficiently achieved through model iterative updates. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is one of the schematic flow charts of the blood oxygen saturation simulation method;

[0040] Figure 2 This is the second schematic diagram of the blood oxygen saturation simulation method;

[0041] Figure 3 This is the third schematic flowchart of the blood oxygen saturation simulation method;

[0042] Figure 4 This is the fourth schematic flowchart of the blood oxygen saturation simulation method;

[0043] Figure 5 is a schematic block diagram of embodiment 1 of a reflective blood oxygen saturation simulation device;

[0044] Figure 6 Yes Yes Yes A reflective blood oxygen saturation simulation device is used for the connection diagram of the reflective blood oxygen saturation simulation device test;

[0045] Figure 7 is a schematic block diagram of embodiment 2 of a reflective blood oxygen saturation simulation device;

[0046] Figure 8 is a schematic block diagram of Embodiment 3 of a reflective blood oxygen saturation simulation device;

[0047] Fig. 9 This is a partial connection diagram of embodiment 4 of the reflective blood oxygen saturation simulation device for testing the reflective blood oxygen saturation simulation device;

[0048] Fig.10 It is a schematic diagram of the connection between the two ends of a single optical signal channel;

[0049] Fig.11 It is a schematic diagram of the light-sensitive spectrum of a light-sensing device;

[0050] Fig.12 It is one of the timing diagrams of the photoelectric signal obtained on the light sensing device;

[0051] Fig.13 This is the second schematic diagram of the timing of the photoelectric signal obtained from the light sensing device;

[0052] Fig.14 This is the third schematic diagram of the timing of the photoelectric signal obtained from the light sensing device;

[0053] Fig.15 This is the fourth schematic diagram of the timing of the photoelectric signal obtained from the light sensing device;

[0054] Fig.16 This is the fifth timing diagram of the photoelectric signal obtained from the light sensing device. DETAILED DESCRIPTION

[0055] The content of this application is further described in detail below in conjunction with the accompanying drawings.

[0056] It should be noted that the following is a description of the preferred embodiments of the present application, which does not constitute any limitation to the present application. The description of the preferred embodiments of the present application is only an explanation of the general principles of the present application. The embodiments described in this application are only a part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0057] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", and technical features numbered with Arabic numerals 1, 2, 3, etc., and numbers such as "A" and "B", are only used for descriptive purposes and are only for the convenience of explanation, and do not represent a sequential relationship in time or space; they cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and numbered with Arabic numerals 1, 2, 3, etc. may explicitly or implicitly include one or more of the features. In the description of the present application, “several” means two or more than two, unless otherwise clearly and specifically defined.

[0058] like Figure 1As shown, in an embodiment of a blood oxygen saturation simulation method, the following steps are included: collecting optical signals emitted by an external blood oxygen saturation device to be tested to obtain corresponding photoelectric signals; performing signal processing on the photoelectric signals to obtain optical signal amplitude information and optical signal timing information emitted by multiple light sources on the external blood oxygen saturation device to be tested; the number of the multiple light sources is at least two; according to the optical signal amplitude information and optical signal timing information of each light source, controlling the light source in the blood oxygen saturation simulation device to output optical signals with corresponding amplitude and timing, which are used as blood oxygen saturation simulation signals.

[0059] like Figure 2 As shown, in an embodiment of a blood oxygen saturation simulation method, before collecting the optical signal emitted by the external blood oxygen saturation device to be tested, it also includes the step of obtaining the optical band information corresponding to each optical signal. The information corresponding to each optical signal can be input through external instructions.

[0060] like Figure 3 As shown, in an embodiment of a blood oxygen saturation simulation method, optical band information corresponding to each optical signal is obtained based on amplitude information and timing information of optical signals emitted by multiple light sources.

[0061] like Fig.11 , is a spectral response curve of a light sensing device, the horizontal axis is the wavelength, and the vertical axis is the relative spectral sensitivity. Fig.11 It can be seen that if a light sensing device is used to detect multiple light source signals of different bands output in different time periods, and if the light intensity signals output by the light sources are consistent, the band ranges can be roughly distinguished by the amplitudes of the signals of each band.

[0062] In some embodiments, if the blood oxygen saturation measurement device to be measured includes two light sources, light source A and light source B, such as Fig.11 As shown in FIG. 1 , the central wavelength range of light source A is 660 nm, and the central wavelength range of light source B is 940 nm. The light sensing device includes an independent light sensing device; the independent light sensing device is used to detect signals of multiple bands, and then the main control module distinguishes the signals corresponding to different bands by software methods. At this time, the photoelectric signal obtained on the light sensing device is as follows: Fig.12As shown, TA1 is the time period TA1 when light source A is on, and the photoelectric signal amplitude VA1 is obtained in this time period TA1; TA2 is the time period TA2 when light source A is on, and the photoelectric signal amplitude VA2 is obtained in this time period TA2; according to the above signal, the amplitude and timing of the photoelectric signal XA can be obtained, that is, the size of the photoelectric signal amplitude VA1 and the photoelectric signal amplitude VA2 and their duration, thereby obtaining the key characteristics of the optical signal of the blood oxygen saturation measurement device to be tested. TB1 is the time period TB1 when light source B is on, and the photoelectric signal amplitude VB1 is obtained in this time period TB1; TB2 is the time period TB2 when light source B is on, and the photoelectric signal amplitude VB2 is obtained in this time period TB2. Similarly, according to the above signal, the amplitude and timing of the photoelectric signal XB can be obtained, that is, the size of the photoelectric signal amplitude VB1 and the photoelectric signal amplitude VB2 and their duration, thereby obtaining the key characteristics of the optical signal of the blood oxygen saturation measurement device to be tested. According to the key characteristics of the optical signal, the amplitude ratio of the electrical signals obtained by the light sources of each corresponding band on the optical sensing device and its affiliated amplification circuit is calculated; when the deviation between the amplitude ratio of the electrical signals and the corresponding sensitivity ratio of the light of the corresponding band on the spectral response characteristic curve of the optical sensing device is within the set deviation range, the optical band information corresponding to the corresponding optical signal is determined in combination with the spectral characteristic curve.

[0063] When it is known that the light source has two bands, one light source has a central wavelength range of 660nm and the other has a central wavelength range of 940nm. According to the information that the amplitude of the photoelectric signal XA is smaller than the amplitude of the photoelectric signal XB, the amplitude contrast of the photoelectric signal and the ratio of the absorption rate of the two bands of the spectral absorption characteristics are equivalent. When the ratio is within the set deviation range, combined with Fig.11 According to the spectral absorption characteristics in the image, it can be determined that the central wavelength range of the light source corresponding to the photoelectric signal XA is 660nm, and the central wavelength range of the light source corresponding to the photoelectric signal XB is 940nm, thereby obtaining the light band information corresponding to each light signal. Then, according to the light band information corresponding to each light signal, the light signal amplitude information of each light source and the light signal timing information, that is, the characteristics of the photoelectric signal XA and the photoelectric signal XB, the light source in the blood oxygen saturation simulation device is controlled to output a light signal with corresponding amplitude and timing, which is used as a blood oxygen saturation simulation signal.

[0064] In other embodiments, if the blood oxygen saturation measurement device to be measured includes three light sources, light source 1, light source 2 and light source 3, then the photoelectric signal obtained on the light sensing device is as follows: Fig.13 As shown. Fig.13In the figure, T11 is the time period 1 when light source 1 is on, T21 is the time period 2 when light source 1 is on, T13 is the time period 3 when light source 1 is on, and the photoelectric signal amplitude V11 corresponding to light source 1. T21 is the time period 1 when light source 2 is on, T22 is the time period 2 when light source 2 is on, T23 is the time period 3 when light source 2 is on, and the photoelectric signal amplitude V2 corresponding to light source 2. T31 is the time period 1 when light source 3 is on, T32 is the time period 2 when light source 3 is on, T33 is the time period 3 when light source 3 is on, and the photoelectric signal amplitude V3 corresponding to light source 2. According to the amplitude characteristics of the above signals, it can be judged that there are three light sources working, and the specific light source corresponding to the optical band information can be determined according to the corresponding relationship of the comparison of the amplitudes of each photoelectric signal.

[0065] In other embodiments, the light sensing device is a light sensing device with multiple filter components attached with different light transmission characteristics; the light sensing device outputs electrical signals corresponding to the light bands of each light source according to its own output characteristics, and the light band information corresponding to the corresponding light signal is determined according to the signal characteristics of the light sensing device. Figures 14 to 16 In the illustrated embodiment, the light sensing device has built-in or attached three filter components with different light transmittance characteristics, such as three filters of different wavelength bands. Therefore, the light sensing device can sense light of three different wavelength bands and can output photoelectric signals corresponding to the three different wavelength bands in a distinguishable manner.

[0066] like Fig.14 As shown, the signals output by the light sensing device include VN1 and VN2, indicating that the input light includes light in the N1 band and light in the N2 band. Since the bands of the filter components with different light transmittance characteristics of the light sensing device are known, it can be determined whether the light source being tested is a light source in the N1 band or a light source in the N2 band.

[0067] like Fig.15 As shown, the signals output by the light sensing device include VN3 and VN2, indicating that the input light includes light in the N3 band and light in the N2 band. Since the bands of the filter components with different light transmittance characteristics of the light sensing device are known, it can be determined that the light sources being tested are light sources in the N3 band and light sources in the N2 band.

[0068] like Fig.16 As shown, the signals output by the light sensing device include VN3, VN2 and VN1, indicating that the input light includes light in the N3 band, light in the N2 band and light in the N1 band. Since the bands of the filter components with different light transmittance characteristics of the light sensing device are known, it can be determined that the light source being tested is a light source in the N3 band, a light source in the N2 band and a light source in the N1 band.

[0069] In other embodiments not shown, the photoelectric conversion characteristics and output characteristics of the light sensing device may be different, such as different bands with different output photoelectric signal frequencies; or different bands with different output photoelectric signal amplitudes.

[0070] In other embodiments, if the number of light sources, the wavelength data of each light source, and the simulated tissue type have been obtained from the outside through the user interaction module, the step of judging the light wavelength information can be omitted, and the amplitude and timing tests can be directly performed, and then the light source can be controlled to output the corresponding signal.

[0071] The simulated tissue types include tissue types of different measurement objects, including neonatal cranial brain tissue, pediatric cranial brain tissue, adult cranial brain tissue, neonatal vascular tissue, pediatric vascular tissue, and adult vascular tissue. That is, different blood oxygen saturation signal simulations can be set through external instructions, which can cover various measurement objects and correspond to the simulation of blood oxygen saturation of various tissues. Different simulated tissue types have corresponding different light attenuation models according to the absorption characteristics of tissues for light in different bands; this part is the existing technical content and will not be repeated.

[0072] like Figure 4 As shown, an embodiment of a blood oxygen saturation simulation method also includes a tissue characteristic information acquisition step; the tissue characteristic information includes a measurement object type and a tissue type; the light source in the blood oxygen saturation simulation device selects a corresponding light attenuation model according to the tissue characteristic information, and outputs a light signal of corresponding amplitude and timing, which is used as a blood oxygen saturation simulation signal.

[0073] like Figures 5 to 7 As shown, the optical signal docking module is used to dock the optical signal emitted by the external blood oxygen saturation device to be tested; the optical signal docking module is provided with multiple optical signal channels, and the positions of the multiple optical signal channels are used to correspond one by one with the positions of the light source and the optical sensing device on the blood oxygen saturation probe of the external blood oxygen saturation device to be tested; each optical signal channel includes an optical isolation component and a light-transmitting channel; the optical isolation component is used to establish an independent optical signal channel between a light sensing device and a light source; the light-transmitting channel is isolated by the optical isolation component, and an optical attenuation component is provided in the light-transmitting channel. Figure 7 The optical signal detection module includes a photoelectric conversion circuit, a timing comparison circuit and an analog-to-digital conversion circuit; the optical signal output module includes an LED lighting circuit, a light intensity control circuit and a digital-to-analog conversion circuit.

[0074] like Figure 6 , a method for testing a blood oxygen saturation measurement device, obtaining a blood oxygen saturation simulation signal based on the above-mentioned blood oxygen saturation simulation method; and testing the blood oxygen saturation measurement device based on the obtained blood oxygen saturation simulation signal.

[0075] like Figures 5 to 7As shown, in an embodiment of a reflective blood oxygen saturation simulation device, the device includes a main control module, a light detection and light driving module, and an optical signal docking module; the main control module is electrically connected to the light detection and light driving module; the optical signal docking module is used for optical signal docking between the reflective blood oxygen saturation simulation device and the blood oxygen saturation probe of an external blood oxygen saturation device to be tested; a plurality of optical signal channels are arranged on the optical signal docking module, and the positions of the plurality of optical signal channels are used to correspond one-to-one with the positions of the light source and the optical sensing device on the blood oxygen saturation probe of the external blood oxygen saturation device to be tested.

[0076] like Figures 5 to 7 As shown, in an embodiment of a reflective blood oxygen saturation simulation device, the light detection and light driving module includes a light signal detection module and a light signal output module; the light signal detection module includes a light sensing device and a light signal detection circuit; the main control module includes a light intensity calculation submodule, a light pattern recognition submodule, a light attenuation calculation submodule, and a light logic generation module; the light signal output module includes a light source group and a light source driving circuit; the number and position of the light sensing devices in the light sensing device are used to correspond to the number and position of the light sources on the blood oxygen saturation probe of the external blood oxygen saturation device to be tested; the light sensing device is electrically connected to the light signal detection circuit, and the light signal detection circuit is electrically connected to the main control module, and provides the main control module with a photoelectric signal corresponding to the input light signal; the main control module performs light intensity calculation through the light intensity calculation submodule and performs light pattern recognition through the light pattern recognition submodule according to the received photoelectric signal; and performs light attenuation calculation through the light attenuation calculation submodule according to the characteristics of the light source group and the tissue feature information, generates light logic through the light logic generation module, and outputs a light source driving circuit control signal to the light source driving circuit, and the light source driving circuit drives the light source group to output a light signal with a corresponding light band, light intensity and light timing.

[0077] like Figure 7 As shown, in an embodiment of a reflective blood oxygen saturation simulation device, the optical signal docking module is fixedly connected to the optical detection and optical drive module; the optical signal docking module and the optical detection and optical drive module are connected to form an integral removable and replaceable module.

[0078] like Figure 7 As shown, in an embodiment of a reflective blood oxygen saturation simulation device, it also includes a user interaction module, which is electrically connected to the main control module, and the user interaction module is used to obtain information from the outside; the acquired information includes the number of light sources, the band data of each light source, and the simulated tissue type; it also includes a data storage module, which is electrically connected to the main control module, and the data storage module provides the main control module with optical signal models for simulating different tissues.

[0079] like Figure 8 and Fig. 9As shown, in an embodiment of a reflective blood oxygen saturation simulation device, the light sensing device includes a plurality of light sensing devices, and the plurality of light sensing devices are used to detect light signals of different wavelength bands.

[0080] like Figure 8 and Fig. 9 As shown, in an embodiment of a reflective blood oxygen saturation simulation device, each optical signal channel on the optical signal docking module includes an optical isolation component and a light-transmitting channel; the optical isolation component is used to establish an independent optical signal channel between the light source and the optical sensing device; the light-transmitting channel is isolated by the optical isolation component, and an optical attenuation component is arranged in the light-transmitting channel.

[0081] like Figure 8 and Fig. 9 As shown, in an embodiment of a reflective blood oxygen saturation simulation device, the cross-sectional area of ​​the optical signal channel is larger than the light emitting area of ​​the light source and also larger than the photosensing area of ​​the photosensor device.

[0082] like Figure 8 As shown, the blood oxygen saturation device to be tested includes a light point 120, and the light point 120 can output optical signals in multiple optical bands, that is, multiple light sources can be set on the light point 120. The light emitted by the light source enters the optical sensing device 220 on the optical detection and optical drive module through the optical channel 311. The blood oxygen saturation device to be tested includes three optical sensing devices 111, and correspondingly, the optical detection and optical drive module is also provided with three optical channels 311 and three corresponding reflective blood oxygen saturation simulation device light sources 211; the number of reflective blood oxygen saturation simulation device light sources corresponds to the number of three optical sensing devices included in the blood oxygen saturation device to be tested; an optical isolation component 312 is provided between each optical channel 311; the optical isolation component 312 ensures that the light between each optical channel 311 does not affect each other. Figure 8 Light attenuation components are also provided in the three light channels 311 .

[0083] like Fig. 9 As shown, the blood oxygen probe of the blood oxygen saturation device to be tested includes two light points, A light point 521 and B light point 522. A light point 521 and B light point 522 can be light sources of a single wavelength band, or can be light points that can each output optical signals of multiple wavelength bands. The light emitted by the light source on the A light point 521 enters the optical sensing device 621 on the optical detection and optical drive module through the optical channel 721. The light emitted by the light source on the B light point 522 enters the optical sensing device 622 on the optical detection and optical drive module through the optical channel 722.

[0084] like Fig. 9As shown, the blood oxygen sensor of the blood oxygen saturation device to be tested includes two groups of light sensing devices, group A light sensing devices and group B light sensing devices. Group A light sensing devices include three light sensing devices 511, and correspondingly, the light detection and light driving module is also provided with three light channels and three corresponding reflective blood oxygen saturation simulation device light sources 611; and light isolation components 711 are provided between each light channel.

[0085] like Fig. 9 As shown, the light sensing device of group B includes three light sensing devices 513, and correspondingly, the light detection and light driving module is also provided with three light channels and three corresponding reflective blood oxygen saturation simulation device light sources 613; and light isolation components 723 are provided between each light channel. The light isolation components 711 and the light isolation components 723 can ensure that the light between each light channel does not affect each other.

[0086] In some embodiments of the reflective blood oxygen saturation simulation device not shown in the drawings, the light attenuation component includes a light-transmitting sheet with specific light attenuation characteristics. In other embodiments not shown in the drawings, the light attenuation component is a simulated tissue light attenuation structure made of a chemical mixture with specific light transmittance characteristics. In other embodiments not shown in the drawings, the light attenuation component also includes a light-homogenizing component, and the light-homogenizing component includes a lens or a lens combination.

[0087] like Fig.10 As shown, in an embodiment of a reflective blood oxygen saturation simulation device, the optical signal detection module also includes a filter component, which is arranged before the optical sensing device and is used to filter the optical signal band entering the optical sensing device. Fig.10 Other components are omitted in the figure, and only the components corresponding to one optical channel are shown. Fig.10 As shown, the blood oxygen probe of the blood oxygen saturation device to be tested includes a light point 721, and a light sensing device 822 is correspondingly provided on the light detection and light driving module, and a filter component 821 is also provided in front of the light sensing device 822; the filter component 821 can be a narrow-band filter or other filter devices. The filter component 821 can include a group of filters or only one filter; a group of filters or one filter can be integrated with the light sensing device 822 in one device.

[0088] The above description is only an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A reflective blood oxygen saturation simulation device, characterized in that: It includes a main control module, a light detection and light driving module, and an optical signal docking module; The main control module is connected with the light detection and light driving module by electrical signals; The optical signal connection module is used for optical signal connection between the reflective blood oxygen saturation simulation device and the blood oxygen saturation probe of the external blood oxygen saturation device to be tested; The optical signal docking module is provided with a plurality of optical signal channels, and the positions of the plurality of optical signal channels are used to correspond one-to-one with the positions of the light source and the optical sensing device on the blood oxygen saturation probe of the external blood oxygen saturation device to be tested.

2. The reflective blood oxygen saturation simulation device according to claim 1, characterized in that: The optical detection and optical driving module includes an optical signal detection module and an optical signal output module; The optical signal detection module includes an optical sensing device and an optical signal detection circuit; The main control module includes a light intensity calculation submodule, a light pattern recognition submodule, a light attenuation calculation submodule, and a light logic generation module; The optical signal output module includes a light source group and a light source driving circuit; The position of the optical sensing device is used to correspond to the number and position of the light sources on the blood oxygen saturation probe of the external blood oxygen saturation device to be tested; the optical sensing device is electrically connected to the optical signal detection circuit, and the optical signal detection circuit is electrically connected to the main control module to provide the main control module with a photoelectric signal corresponding to the input optical signal; The main control module calculates the light intensity and identifies the luminous pattern based on the received photoelectric signal; calculates the light attenuation and generates the luminous logic based on the characteristics of the light source group, and outputs the light source drive circuit control signal to the light source drive circuit. The light source drive circuit drives the light source group to output a light signal with the corresponding light band, light intensity and luminous timing.

3. The reflective blood oxygen saturation simulation device according to claim 1, characterized in that: The optical signal docking module is fixedly connected to the optical detection and optical drive module; The optical signal docking module and the optical detection and optical driving module are connected to form an integral removable and replaceable module.

4. The reflective blood oxygen saturation simulation device according to claim 1, characterized in that: Also includes any of the following technical features: TB1: The light sensing device includes an independent light sensing device; the independent light sensing device is used to detect light signals of multiple light sources, and the main control module is used to distinguish different light band information of the multiple light sources according to the photoelectric signals obtained by the light sensing device; TB2: The light sensing device is a light sensing device with multiple filter components attached with different light transmittance characteristics. The light sensing device with multiple filter components attached with different light transmittance characteristics is used to physically distinguish different light band information of multiple light sources.

5. The reflective blood oxygen saturation simulation device according to claim 1, characterized in that: Each optical signal channel on the optical signal docking module includes an optical isolation component and a light-transmitting channel; The optical isolation component is used to establish an independent optical signal channel between the light source and the optical sensing device; The light-transmitting channel is isolated by a light-isolating component, and a light-attenuating component is arranged in the light-transmitting channel.

6. The reflective blood oxygen saturation simulation device according to claim 5, characterized in that: Also includes any of the following technical features: TA1: The cross-sectional area of ​​the optical signal channel is larger than the light emitting area of ​​the light source; TA2: The cross-sectional area of ​​the optical signal channel is larger than the photosensitive area of ​​the optical sensing device; TA3: The light attenuation component includes a light-transmitting material with specific light attenuation characteristics, and the light-transmitting material with specific light attenuation characteristics includes a structure prepared from a chemical mixture with specific light-transmitting characteristics or a light-transmitting sheet with specific light-transmitting characteristics; TA4: The light attenuation component also includes a light homogenizing component, and the light homogenizing component includes a lens, a lens combination or a film.

7. The reflective blood oxygen saturation simulation device according to claim 1, characterized in that: It also includes a user interaction module, which is connected to the main control module by electrical signals, and is used to obtain information from the outside; the information obtained includes the number of light sources, the band data of each light source, and the simulated tissue type.

8. The reflective blood oxygen saturation simulation device according to claim 7, characterized in that: It also includes a data storage module, which is electrically connected to the main control module, and the data storage module provides the main control module with optical signal models of different tissue simulations.

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