Simulation device and test system

Abstract

The utility model is suitable for the technical field of earphone performance testing, and provides a simulation device and a testing system.The testing system comprises the simulation device and control equipment, the control equipment sends a control signal to the simulation device, and the control signal comprises a preset rotation angle of a blood oxygen simulation rotary disc in the simulation device; different preset angles correspond to different areas of relative areas between the optical filter and the signal transmission port of the sleeve, and the optical filters with different areas have different cut-off proportions of infrared light signals in blood oxygen detection signals sent by the earphone to be detected; at a preset angle, a blood oxygen detection signal sent by the to-be-detected earphone is reflected through a heart rate simulation turntable in the simulation device, and the reflected detection signal is returned to the to-be-detected earphone; the earphone to be tested determines a blood oxygen detection result according to the reflected detection signal, the method can flexibly simulate various blood oxygen saturation degrees, and then the blood oxygen detection performance of the earphone to be tested is tested.

Description

Technical Field

[0001] This application belongs to the field of headphone performance testing technology, and in particular relates to a simulation device and testing system. Background Technology

[0002] Headphones equipped with health monitoring functions such as blood oxygen saturation monitoring mean they can not only play music but also monitor the user's blood oxygen saturation. This health-related data is highly valuable to users because it helps them understand their physical condition and make adjustments as needed. Therefore, it is crucial that headphones undergo precise performance testing before leaving the factory.

[0003] In related technologies, when simulating headphone performance, different materials with fixed reflectivity ratios may be selected to simulate different blood oxygen saturation levels, thereby simulating signal reflection under different blood oxygen saturation levels. For example, standard yellow and red have different reflectivity ratios for infrared (IR) and red (R) light. However, the reflectivity ratio corresponding to a specific reflective material is fixed. Thus, the simulated blood oxygen saturation is also fixed and cannot meet the simulation of multiple or ideal blood oxygen saturation values. Summary of the Invention

[0004] This application provides a simulation device and a testing system that can flexibly simulate various blood oxygen saturation levels, thereby testing the blood oxygen saturation detection performance of headphones.

[0005] In a first aspect, embodiments of this application provide a simulation device, including a blood oxygen simulation turntable and an earphone fixing fixture, wherein filters are placed in different areas of the blood oxygen simulation turntable and the earphone fixing fixture to be tested includes a sleeve.

[0006] The earphone under test fixing fixture is used to fix the earphone under test. The earphone under test transmits blood oxygen detection signals to the blood oxygen simulation turntable through the sleeve.

[0007] The blood oxygen simulation turntable is used to rotate at a preset angle according to the control signal, so that the relative areas between the signal transmission ports of the filter and the sleeve are different.

[0008] The filter is used to filter the blood oxygen detection signal based on the relative area between it and the sleeve.

[0009] In this embodiment, the blood oxygen simulation turntable can rotate at a preset angle according to a control signal. This changes the relative area between the filter and the signal transmission port of the sleeve, thereby simulating blood oxygen signals of different concentrations. The filter intercepts the emitted signal based on the relative area between itself and the sleeve. This may involve a special design of the filter to simulate the absorption and reflection characteristics of light by blood. Such a simulation device can provide a controlled environment for testing and evaluating the performance of headphones at different blood oxygen saturation levels.

[0010] In one possible implementation of the first aspect, the filters placed in different areas are the same.

[0011] In the embodiments of this application, since all filters are identical, the test results between different regions are more comparable, facilitating accurate comparative analysis.

[0012] In one possible implementation of the first aspect, the blood oxygen detection signal includes a red light signal and an infrared light signal, and the filter has high transmittance for the red light signal in the blood oxygen detection signal and high cutoff for the infrared light signal in the blood oxygen detection signal.

[0013] In this embodiment, the filter has high transmittance for red light signals in the blood oxygen detection signal, meaning that the filter allows red light signals to pass through smoothly, reducing signal attenuation. Simultaneously, it has cut-off characteristics for infrared light signals, meaning that the filter reflects infrared light signals back, reducing the transmission of infrared light signals. This design allows different parts of the signal to propagate according to different characteristics, potentially improving detection accuracy.

[0014] In one possible implementation of the first aspect, the filter is used to cut off the infrared light signal in the blood oxygen detection signal based on the relative area between it and the sleeve, such that the cutoff ratio of the infrared light signal in the blood oxygen detection signal is different for the relative areas of different areas.

[0015] In this embodiment, the filter reflects the infrared light signal in the blood oxygen detection signal based on its relative position to the sleeve. This adjustment can be used to control the intensity of the infrared light signal. By making the cutoff ratios of different relative areas of the infrared light signal different, the spatial distribution of the infrared light signal can be controlled to control different cutoff ratios of red and infrared light, thereby simulating different blood oxygen saturation levels and helping to improve the accuracy and precision of blood oxygen detection.

[0016] In one possible implementation of the first aspect, the simulation device further includes a heart rate simulation turntable, which includes a reflective surface for reflecting the blood oxygen detection signal sent by the earphone under test, and the heart rate simulation turntable is mounted below the blood oxygen simulation turntable.

[0017] In this embodiment of the application, the heart rate simulation turntable is installed below the blood oxygen simulation turntable, which may help to create a multi-layered simulation environment in which changes in blood oxygen and heart rate can occur independently or simultaneously, providing more realistic testing conditions for the headphones.

[0018] In one possible implementation of the first aspect, the simulation device further includes a drive device for driving the blood oxygen simulation turntable and the heart rate simulation turntable to rotate.

[0019] In one possible implementation of the first aspect, the sleeve includes a reflective sticker disposed on the inner wall of the sleeve, the reflective sticker being used to enhance the received reflected signal.

[0020] In this embodiment, the reflective sticker can effectively collect and focus reflected signals, thereby improving the detection device's ability to capture received signals and thus improving the accuracy of blood oxygen detection.

[0021] Secondly, embodiments of this application provide a testing system, including:

[0022] The testing system includes a control device and a simulation device according to any of the first aspects above. The control device is used to send control signals to the simulation device to control the rotation of the heart rate simulation turntable and the blood oxygen simulation turntable of the simulation device.

[0023] In the embodiments of this application, the introduction of a control device automates the testing process, improving testing efficiency and consistency.

[0024] In one possible implementation of the second aspect, the control device and the simulation device communicate via serial communication.

[0025] In one possible implementation of the second aspect, the test system also includes a Bluetooth adapter;

[0026] The Bluetooth adapter establishes Bluetooth communication with both the control device and the earphone under test.

[0027] The earphone under test is used to receive the detection signal reflected by the analog device, perform blood oxygen analysis on the reflected detection signal, obtain the blood oxygen detection result, and send the blood oxygen detection result to the control device through the Bluetooth adapter;

[0028] The control device is used to receive the blood oxygen detection results sent by the earphone under test via a Bluetooth adapter, and to determine the performance test results of the earphone under test based on the blood oxygen detection results.

[0029] In this embodiment, the earphone under test establishes communication with the control device through a Bluetooth adapter, which enables the test system to remotely receive and send data, improving the convenience and operability of the test. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the simulation device provided in the embodiments of this application. Figure 1 ;

[0032] Figure 2 This is a schematic diagram of the simulation device provided in the embodiments of this application. Figure 2 ;

[0033] Figure 3 This is a schematic diagram of the simulation device provided in the embodiments of this application. Figure 3 ;

[0034] Figure 4 This is a schematic diagram of the testing system provided in the embodiments of this application. Figure 1 ;

[0035] Figure 5 This is a schematic diagram of the testing system provided in the embodiments of this application. Figure 2 ;

[0036] Figure 6 This is a schematic block diagram of the overall structure of the test system provided in the embodiments of this application. Detailed Implementation

[0037] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0038] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0039] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0040] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0041] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0042] References to "one embodiment" or "some embodiments" in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized.

[0043] Headphones equipped with health monitoring functions such as blood oxygen saturation monitoring mean they can not only play music but also monitor the user's blood oxygen saturation. This health-related data is highly valuable to users because it helps them understand their physical condition and make adjustments as needed. Therefore, it is crucial that headphones undergo precise performance testing before leaving the factory.

[0044] In related technologies, when simulating headphone performance, different materials with fixed reflectivity ratios may be selected to simulate different blood oxygen saturation levels, thereby simulating signal reflection under different blood oxygen saturation levels. For example, standard yellow and red have different reflectivity ratios for infrared (IR) and red (R) light. However, the reflectivity ratio corresponding to a specific reflective material is fixed. Thus, the simulated blood oxygen saturation is also fixed and cannot meet the simulation of multiple or ideal blood oxygen saturation values.

[0045] To address the aforementioned technical problems, this application provides an earphone performance testing device and system. In this application, a blood oxygen simulation testing platform is constructed to model the human body's absorption or reflection of different light levels. In the simulation platform, a special filter material is used, which has high transmittance for red light and high cutoff for infrared light. Utilizing these characteristics, the cutoff ratio of red light to infrared light in the testing platform can be controlled, thereby obtaining arbitrary R coefficients related to red light and infrared light to simulate arbitrary blood oxygen saturation.

[0046] The above methods allow for flexible testing of headphone performance under different blood oxygen saturation levels.

[0047] It should be noted that the above-mentioned blood oxygen saturation is the percentage of oxygenated hemoglobin (HbO2) bound to oxygen in the blood relative to the total available hemoglobin (Hb), i.e., the concentration of oxygen in the blood. Based on the light absorption characteristics of oxyhemoglobin (HbO2) and hemoglobin (Hb) at wavelengths of 600-1000 nm, it can be known that Hb has a higher absorption coefficient in the 600-800 nm wavelength range, while HbO2 has a higher absorption coefficient in the 800-1000 nm wavelength range. Therefore, red light (typical wavelength 630 nm) and near-infrared light (typical wavelength 950 nm) can be used to bind with Hb and HbO2 respectively. The reflected signals are collected by a photodiode (PD) in the earphone under test, and then analyzed to separate the signal received by the PD into DC and AC components. The direct current (DC) component represents the light absorption caused by tissue, venous blood, and non-pulsatile arterial blood, while the alternating current (AC) component represents the light absorption by pulsatile arterial blood, reflecting the changes caused by contraction and relaxation. By collecting the ratio of DC to AC values ​​of IR and R-reflection, and processing them accordingly, the percentage of blood oxygen saturation can be obtained. Here, a combination of reflective materials on the inner wall of the sleeve and the heart rate dial is used to simulate human tissue. The inner wall of the sleeve uses a single reflective material, analogous to the IR absorption of our muscles, bones, veins, and other tissues, while the dial uses multiple reflective materials, analogous to the IR absorption of human arterial tissue.

[0048] See Figure 1 This is a schematic diagram of the simulation device provided in the embodiments of this application. Figure 1 ,like Figure 1 As shown, the simulation device 1 includes a blood oxygen simulation turntable 11 and an earphone fixing fixture 12. Filters 111 are placed in different areas of the blood oxygen simulation turntable 11, and the earphone fixing fixture 12 includes a sleeve 121.

[0049] The earphone under test fixing fixture 12 is used to fix the earphone under test. The earphone under test transmits a blood oxygen detection signal to the blood oxygen simulation turntable 11 through the sleeve 121.

[0050] The blood oxygen simulation turntable 11 is used to rotate at a preset angle according to the control signal, so that the relative areas between the filter 111 and the signal transmission port 1211 of the sleeve 121 are different.

[0051] The filter 111 is used to filter the blood oxygen detection signal based on the relative area between it and the sleeve 121.

[0052] In this embodiment, the simulation device 1 is a specially designed device for simulating a real-world blood oxygenation detection environment to test the blood oxygenation detection function of the headphones. The simulation device 1 includes a blood oxygenation turntable that can rotate at a preset angle according to a control signal. The turntable is fully transparent, and filters 111 are placed at different positions (different areas) within it. These filters 111 are made of a special filtering material that reflects the transmission characteristics of different wavelengths of red and infrared light, simulating the different absorption and reflection characteristics of hemoglobin in blood. They are placed in different areas of the blood oxygenation simulation turntable 11 to filter the blood oxygenation detection signal at different angles and positions. The blood oxygenation simulation turntable 11 can also be a motor-driven turntable, allowing it to rotate at different angles.

[0053] The simulation device 1 also includes an earphone fixing fixture 12 for fixing the earphone under test. It may be fixed to the turntable by screws, clamps, or other fixing devices to ensure the earphone under test maintains a stable position during testing. The earphone fixture helps the tester to accurately place the earphone. The earphone fixture also includes a sleeve 121, which is connected to the earphone fixing fixture 12. The signal transmission port 1211 in the sleeve 121 is adjacent to the filter 111 of the blood oxygen simulation turntable 11. The earphone under test transmits a blood oxygen detection signal to the turntable through the sleeve 121.

[0054] When the simulation device 1 is operating, the blood oxygen simulation turntable 11 rotates to a preset angle according to a control signal. This changes the relative area between the filter 111 and the sleeve 121, simulating the change in hemoglobin concentration in the blood with position. The filter 111 separates the emitted blood oxygen detection signal based on the relative area between itself and the sleeve 121. This selective light processing simulates the absorption and binding characteristics of hemoglobin, allowing the headphones to detect light signals of different intensities and wavelengths.

[0055] In the aforementioned simulation device, the blood oxygen simulation turntable 11 can rotate at a preset angle according to a control signal. This changes the relative area between the filter 111 and the signal transmission port 1211 of the sleeve 121, thereby simulating blood oxygen signals of different concentrations. The filter 111 selectively filters the emitted signal based on the relative area between it and the sleeve 121. This may involve a special design of the filter to simulate the absorption and reflection characteristics of light by blood. This simulation device 1 can provide a controlled environment for testing and evaluating the performance of headphones under different blood oxygen saturation levels.

[0056] In one embodiment, the filters 111 placed in different areas are the same.

[0057] In this embodiment, all filters 111 on the turntable are made of the same material and are identical. This ensures that the influence of the filters 111 on the blood oxygen detection signal is uniform. This design allows for the simulation of changes in hemoglobin concentration in the simulation device 1 by altering the area of ​​the relative region between the filters 111 and the sleeve 121, rather than by changing the material of the filters to affect the test results. This allows for a more accurate evaluation of the earphone's blood oxygen detection function, as they respond identically to different concentrations of hemoglobin.

[0058] In the above simulation device, all light sheets are made of the same material, making the test results between different areas more comparable and facilitating accurate comparative analysis.

[0059] In one embodiment, the blood oxygen detection signal includes a red light signal and an infrared light signal. The filter 111 has high transmittance for the red light signal in the blood oxygen detection signal and high cutoff for the infrared light signal in the blood oxygen detection signal.

[0060] In this embodiment, the filter 111 is a special filter material that reflects the transmittance characteristics of various wavelengths. For example, it has a transmittance of over 95% for wavelengths of 400-700nm, while other wavelengths are cut off. The selected RLED wavelength range is 620±15nm, and the IRLED wavelength range is 940±20nm. Therefore, the red light emitted by the headphones has a transmittance of up to 95%, while infrared light is essentially cut off and reflected by the filter. Thus, we can control the proportion of IR light passing through a certain area of ​​the blood oxygenation dial. By controlling the absorption ratio of IR and R signals, we can effectively simulate the absorption characteristics of the human body's Hb and HbO2 signals, and thus calculate different blood oxygen saturation levels.

[0061] In the aforementioned simulation device, filter 111 has high transmittance for red light signals in the blood oxygen detection signal, meaning that the filter allows red light signals to pass through smoothly, reducing signal attenuation. Simultaneously, it has high cutoff for infrared light signals, meaning that the filter blocks infrared light signals from passing through, reducing infrared light signal transmission. This design allows different parts of the signal to propagate according to different characteristics, potentially improving detection accuracy.

[0062] In one embodiment, the filter 111 is used to cut off the infrared light signal in the blood oxygen detection signal based on the relative area between it and the sleeve 121, so that the cutoff ratio of the infrared light signal in the blood oxygen detection signal is different for the relative areas of different areas.

[0063] In this embodiment, by changing the relative area between the filter 111 and the sleeve 121, the intensity of the infrared light signal reflected back to the sensor will also change accordingly. This design allows for more precise control and adjustment of the signal intensity reflected back to the sensor, thereby providing more accurate results in blood oxygenation detection by simulating the absorption of infrared light by different concentrations of hemoglobin. For example, when the concentration of oxyhemoglobin is high, more infrared light will be absorbed, and therefore the signal intensity reflected back to the sensor will be low; when the concentration of oxyhemoglobin is low, less infrared light will be absorbed, and therefore the signal intensity reflected back to the sensor will be high.

[0064] In the aforementioned simulation device, the filter 111, through its relative position to the sleeve 121, cuts off the infrared light signal in the blood oxygen detection signal. This adjustment can be used to control the intensity of the infrared light signal. By making the cutoff ratio of the infrared light signal different in different relative areas, the spatial distribution of the infrared light signal can be controlled to control different reflection ratios of red and infrared light, thereby simulating different blood oxygen saturation levels and helping to improve the accuracy and precision of blood oxygen detection.

[0065] In one embodiment, see Figure 2 This is a schematic diagram of the simulation device provided in the embodiments of this application. Figure 2 ,like Figure 2 As shown, the simulation device 1 also includes a heart rate simulation turntable 13, which includes a reflective surface for reflecting the blood oxygen detection signal sent by the earphone under test. The heart rate simulation turntable 13 is installed below the blood oxygen simulation turntable 11.

[0066] In this embodiment, the simulation device 1 further includes a heart rate simulation turntable 13. The heart rate turntable 121 is divided into two equally sized reflective regions, m and n. The colors of reflective regions m and n can be set to gray and black, respectively. Gray represents materials with low infrared light absorption, and black represents materials with high infrared light absorption. Between these two extreme reflectivity materials, a transitional reflectivity material (with intermediate reflectivity) is found, namely transition region j and transition region k. Reflective regions m and n have equal areas but different reflectivities, while transition regions j and k have equal areas and the same reflectivity.

[0067] In the above simulation device, the heart rate simulation turntable 13 is positioned below the blood oxygen simulation turntable 11. It mainly reflects the signal passing through the blood oxygen simulation turntable 11 to simulate the heart rate movement trajectory, so as to ensure the detection of living organisms.

[0068] In one embodiment, see Figure 3 This is a schematic diagram of the simulation device provided in the embodiments of this application. Figure 3 ,like Figure 3 As shown, the sleeve 121 includes a reflective sticker disposed on the inner wall of the sleeve 121. The reflective sticker is used to enhance the received reflected signal.

[0069] In this embodiment, the reflective sticker may contain special materials, such as metal powder or a thin metal film, which are capable of reflecting signals of specific frequencies. The reflective sticker (also called a mirror or reflector) can be used to enhance the reflection of light. When light shines on the reflective sticker, the sticker reflects the light back into the optical path of the device. This reflection can enhance the intensity of the light, thereby amplifying the reflected signal.

[0070] Specifically, when the earphone under test sends a detection signal to the filter 111 on the blood oxygen simulation turntable 11 through the sleeve 121, the reflected detection signal can be amplified by the reflective sticker in the sleeve 121 because the filter 111 has a high cutoff for infrared light in the detection signal, so that the amplified reflected signal can be collected by the signal under test.

[0071] In the aforementioned simulation device, the reflective sticker can effectively collect and focus reflected signals, thereby improving the detection device's ability to capture received signals and thus improving the accuracy of blood oxygen detection.

[0072] This application provides a testing system, see [link to relevant documentation] Figure 4 This is a schematic diagram of the testing system provided in the embodiments of this application. Figure 1 ,like Figure 4As shown, the test system 2 includes a control device 3 and a simulation device 1. The control device 3 is used to send control signals to the simulation device 1 to control the rotation of the heart rate simulation turntable 13 and the blood oxygen simulation turntable 11 of the simulation device 1.

[0073] In this embodiment, the control device 3 is a component of the test system 2, responsible for sending and receiving control signals and executing corresponding control logic. The control device is connected to the simulation device 1, ensuring that the control device 3 can effectively send commands and receive feedback from the simulation device 1. The control device 3 can be a personal computer (PC), which may run dedicated control software. This software can exchange data and control commands with field devices (such as machines, sensors, actuators, etc.) through various communication protocols.

[0074] It should be noted that the simulation device 1 is housed within a drivable drive device. The control device 3, connected to the drive device, controls the rotation of the drive device, thereby controlling the rotation of the blood oxygen simulation turntable and the heart rate simulation turntable 13 within the simulation device 1. The control device 3 and the drive device communicate via a hardware interface protocol, such as the RS32 programmable control protocol. When communicating using the RS32 protocol, the control device 3 sends specific commands to the drive device, which then executes corresponding operations based on these commands.

[0075] Specifically, the driving device can be a motor, which can receive programmable commands containing rotation frequency sent by control device 3. When the motor receives a start signal from control device 3, it begins to rotate at the rotation frequency contained in the signal. If the motor receives an RS-232 programmable command from control device 3, which starts the motor from rotating at a preset angle β, the motor will execute the corresponding operation after receiving the command. The turntable and the motor can be mechanically connected, such as by connecting the motor's output shaft to the turntable's input shaft, possibly using gears, belts, chains, or other transmission devices. Control device 3 sends control signals to the motor to adjust its operation to achieve the required rotation speed or frequency, thereby driving the rotation of the motor turntable.

[0076] In the aforementioned test system 2, the introduction of control device 3 automates the testing process, improving testing efficiency and consistency.

[0077] In one embodiment, see Figure 5 This is a schematic diagram of the testing system provided in the embodiments of this application. Figure 2 like Figure 5 As shown, the test system 2 also includes a Bluetooth adapter 4;

[0078] Bluetooth adapter 4 establishes Bluetooth communication with control device 3 and the earphone under test respectively; the earphone under test is used to receive the detection signal reflected by analog device 1, perform blood oxygen analysis on the reflected detection signal, obtain blood oxygen detection results, and send the blood oxygen detection results to control device 3 through Bluetooth adapter 4; control device 3 is used to receive the blood oxygen detection results sent by the earphone under test through Bluetooth adapter 4, and determine the performance test results of the earphone under test based on the blood oxygen detection results.

[0079] In this embodiment, the Bluetooth adapter 4 and the earphone under test can be wirelessly connected. Its function is to acquire the data collected by the earphone under test through Bluetooth wireless technology. Then, the Bluetooth adapter 4 and the control device 3 are connected through a serial port, and the data can be sent to the control device 3 through the serial port.

[0080] Specifically, the earphone under test receives the reflected detection signal, performs blood oxygen analysis, and then sends the blood oxygen detection result to the control device 3 via Bluetooth adapter 4. Finally, the control device 3 evaluates the earphone's performance. This system design allows for convenient testing and comparison of the blood oxygen detection functions of different earphones.

[0081] In the above testing system, the earphone under test establishes communication with the control device 3 through the Bluetooth adapter 4, which enables the testing system 2 to remotely receive and send data, improving the convenience and operability of the test.

[0082] See Figure 6 This is a schematic block diagram of the overall structure of the testing system provided in the embodiments of this application, as shown below. Figure 6 As shown, the test system includes: a test PC (control device) 3, a simulation device 1, and a Bluetooth adapter 4. The simulation device 1 includes a heart rate simulation turntable 13, a blood oxygen simulation turntable 1112, an earphone fixing fixture, and a sleeve 121. The sleeve 121 includes a signal transmission port 1211. Multiple identical filters 111 are set on the blood oxygen simulation turntable 11, each filter corresponding to a different rotation angle. When the blood oxygen turntable rotates to a preset angle corresponding to a certain filter, the relative area of ​​the filter and the signal transmission port of the sleeve is different. Different areas correspond to different infrared light cutoff ratios. This test system can be used to test the blood oxygen detection function of the earphone under test.

[0083] It should be noted that the heart rate simulation turntable is located below the blood oxygen simulation turntable. Its purpose is to simulate the detection of living organisms and determine whether an object has life characteristics. Based on the assumption that the object has life characteristics, its blood oxygen saturation is detected. The heart rate turntable can rotate at a constant speed of 80 rpm, and the speed is not adjusted during the entire blood oxygen measurement. This simulates the heart rate value of a human body at rest. This is based on the fact that the human body needs to remain at rest when measuring blood oxygen in a real environment.

[0084] Through the above Figure 6The steps for testing the blood oxygenation performance of the earphone under test using the blood oxygenation testing system are as follows:

[0085] 1. The tester places the earphone under test at point 12 of the earphone fixing fixture;

[0086] 2. The test PC (control device 3) sends a control signal to the simulation device 1. The control signal includes a preset angle β that controls the rotation of the blood oxygen simulation turntable 11 to block infrared light signals of different ratios.

[0087] 3. The blood oxygen simulation turntable 11 is installed on the driving device. The driving device controls the blood oxygen simulation turntable 11 to rotate by a preset angle β according to the signal, so that the relative area between the signal transmission port 1211 of the sleeve 121 in the blood oxygen simulation turntable 11 and the filter 111 is within a preset area. Within this preset area, a certain proportion of the reflected signal is reflected by infrared light.

[0088] 4. After the blood oxygen simulation turntable 11 rotates to a preset angle, the control device 3 determines whether the error between the rotation angle of the blood oxygen simulation turntable 11 and the preset angle is within a preset threshold. If the error between the rotation angle of the blood oxygen simulation turntable 11 and the preset angle is not within the preset threshold, the relative area between the filter of the blood oxygen simulation turntable and the signal transmission port of the sleeve is adjusted, and the preset blood oxygen value corresponding to the current preset angle of the blood oxygen simulation turntable is calibrated so that the difference between the area of ​​the relative area and the preset area is less than the preset threshold.

[0089] 5. The tester starts the earphone under test through the test PC (control device 3) and sends an LED signal containing R and IR signals. The R and IR signals are injected into the filter 111 in the blood oxygen simulation turntable 11 through the sleeve 121. Infrared light can pass through the area of ​​the sleeve 121 where the filter 111 does not block it, and infrared light is blocked in the blocked area. Red light can pass through the area of ​​the blood oxygen simulation turntable 11 opposite the sleeve 121. The passed signal can be injected into the heart rate simulation turntable 13 so that the heart rate turntable reflects the passed signal.

[0090] 6. The reflected detection signal is collected by the earphone under test through sleeve 121;

[0091] 7. The earphone under test collects the reflected detection signal, and performs signal processing on the R and IR signals in the reflected detection signal to obtain the blood oxygen saturation.

[0092] 8. Bluetooth adapter 4 (Bluetooth device) reads the blood oxygen detection results of the earphone under test via wireless SPP (Bluetooth technology);

[0093] 9. Bluetooth adapter 4 sends the blood oxygen detection results to the test PC (control device 3) via serial port protocol;

[0094] 10. The test PC compares the blood oxygen detection value in the blood oxygen detection result with the preset blood oxygen value (the preset blood oxygen value corresponding to the relative area of ​​the signal transmission port 1211 of the filter 111 and the sleeve 121) to determine whether the headphone under test meets the technical specifications and displays the performance test result of the headphone under test as PASS or NG. If the error is within ±3% bpm, the performance test result of the headphone under test is displayed as PASS; otherwise, it is displayed as NG.

[0095] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0096] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0097] In the embodiments provided in this application, it should be understood that the disclosed apparatus / terminal devices and methods can be implemented in other ways. For example, the apparatus / terminal device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0098] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0099] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A simulation device, characterized in that, The simulation device includes a blood oxygen simulation turntable and an earphone fixing fixture. Filters are placed in different areas of the blood oxygen simulation turntable, and the earphone fixing fixture includes a sleeve. The earphone fixing fixture is used to fix the earphone under test, and the earphone under test emits a blood oxygen detection signal to the blood oxygen simulation turntable through the sleeve; The blood oxygen simulation turntable is used to rotate at a preset angle according to the control signal, so that the relative areas between the signal transmission ports of the filter and the sleeve are different. The filter is used to filter the blood oxygen detection signal based on the relative area between it and the sleeve.

2. The simulation device as described in claim 1, characterized in that, The filters placed in different areas are identical.

3. The simulation device as described in claim 2, characterized in that, The blood oxygen detection signal includes a red light signal and an infrared light signal. The filter has high transmittance for the red light signal in the blood oxygen detection signal and high cutoff for the infrared light signal in the blood oxygen detection signal.

4. The simulation device as described in claim 3, characterized in that, The filter is used to cut off the infrared light signal in the blood oxygen detection signal based on the relative area between it and the sleeve, so that the cutoff ratio of the infrared light signal in the blood oxygen detection signal is different for different relative areas.

5. The simulation device as described in claim 1, characterized in that, The simulation device also includes a heart rate simulation turntable, which includes a reflective surface for reflecting the blood oxygen detection signal sent by the earphone under test. The heart rate simulation turntable is installed below the blood oxygen simulation turntable.

6. The simulation device as described in claim 5, characterized in that, The simulation device also includes a drive device for driving the blood oxygen simulation turntable and the heart rate simulation turntable to rotate.

7. The simulation device as described in claim 6, characterized in that, The sleeve includes a reflective sticker disposed on the inner wall of the sleeve, the reflective sticker being used to enhance the received reflected signal.

8. A testing system, characterized in that, The testing system includes a control device and a simulation device as described in any one of claims 1-7, wherein the control device is used to send control signals to the simulation device to control the rotation of the heart rate simulation turntable and the blood oxygen simulation turntable of the simulation device.

9. The testing system as described in claim 8, characterized in that, The control device communicates with the simulation device via serial communication.

10. The testing system as described in claim 9, characterized in that, The testing system also includes a Bluetooth adapter; The Bluetooth adapter establishes Bluetooth communication with the control device and the earphone under test, respectively. The earphone under test is used to receive the detection signal reflected by the analog device, perform blood oxygen analysis on the reflected detection signal to obtain the blood oxygen detection result, and send the blood oxygen detection result to the control device through the Bluetooth adapter; The control device is used to receive the blood oxygen detection result sent by the earphone under test through the Bluetooth adapter, and determine the performance test result of the earphone under test based on the blood oxygen detection result.

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