An imaging health indicator detection device

Abstract

The application provides an imaging health index detection device, and relates to the technical field of medical detection equipment. The device comprises a laser light source, a lens unit, an imaging unit and a filter. The filter is located on the transmission path of the reflected light beam and on the light entrance side of the imaging unit. The transmission wavelength of the filter includes the wavelength of the detection light beam. The laser light source emits the detection light beam. The lens unit focuses the detection light beam on the target region of the detection target, so that the detection light beam can be transmitted to the preset depth of the target region and reflected to form a reflected light beam at the preset depth of the target region. The reflected light beam is transmitted to the imaging unit through the filter. The imaging unit obtains a target image and a detection signal based on the reflected light beam. The target image represents the blood flow distribution at the preset depth of the target region. The detection signal represents the light intensity change of the reflected light beam at the preset depth of the target region within a preset time. A processing unit obtains the health index of the detection target based on the detection signal.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical detection equipment, in particular to an imaging type detection index detection device. BACKGROUND

[0002] With the improvement of living standards, people pay more and more attention to their own health level, for example, heart rate, blood oxygen, blood sugar, blood pressure and other health indicators, which leads to the emergence of various health index detection devices, which gradually popularize into people's daily life.

[0003] With the gradual popularization of health index detection devices, how to improve the reliability of health index detection devices, that is, how to improve the accuracy of the obtained health index, has become a key problem for those skilled in the art. SUMMARY

[0004] Therefore, the present application provides an imaging type health index detection device, and the scheme is as follows:

[0005] An imaging type health index detection device, comprising: a device body;

[0006] The device body comprises:

[0007] A laser light source for emitting a detection light beam, the detection light beam comprising at least a first laser light beam of a first wavelength;

[0008] A lens unit for focusing the detection light beam on a target region of a detection target, so that the detection light beam transmits the target region to a preset depth and reflects to form a reflected light beam at the preset depth of the target region;

[0009] A detection part comprising an imaging unit and an optical filter, the optical filter being located on the transmission path of the reflected light beam and on the light entrance side of the imaging unit, the transmission wavelength of the optical filter comprising the wavelength of the detection light beam; the reflected light beam is transmitted to the imaging unit through the optical filter, the imaging unit obtains a target image and a detection signal based on the reflected light beam, the target image representing the blood flow distribution at the preset depth of the target region, and the detection signal representing the change of the light intensity of the reflected light beam at the preset depth of the target region within a preset time;

[0010] The detection part further comprises a processing unit for obtaining a health index of the detection target based on the detection signal.

[0011] Optionally, the imaging unit comprises a plurality of pixels arranged in M rows and N columns, and M and N are integers greater than 1.

[0012] The target region comprises a plurality of imaging regions, the plurality of imaging regions correspond to at least part of the plurality of pixels one-to-one, each pixel in the plurality of pixels collects a reflected light beam of the imaging region corresponding to the pixel, and generates an optical signal based on the collected reflected light beam, the intensity of the optical signal generated by the pixel is proportional to the light intensity of the collected reflected light beam, so as to obtain the target image.

[0013] Optionally, at least one of the plurality of pixels in the imaging unit generates an optical signal based on the collected reflected light beam within the preset time in response to a control signal, so as to obtain the detection signal.

[0014] The processing unit obtains the health index of the detection target based on the detection signal obtained by the at least one pixel.

[0015] Optionally, the imaging unit is a CCD camera or a CMOS camera.

[0016] Optionally, the optical filter comprises at least one sub-optical filter, the at least one sub-optical filter corresponds to a laser beam in the detection light beam one-to-one, and the transmission wavelength of each sub-optical filter in the at least one sub-optical filter corresponds to the wavelength of one laser beam in the detection light beam.

[0017] Optionally, a first driving unit is further included.

[0018] The first driving unit drives any one of the at least one sub-optical filter to the light entrance side of the imaging unit; or

[0019] The first driving unit drives part or all of the at least one sub-optical filter to the light entrance side of the imaging unit in sequence.

[0020] Optionally, the imaging unit comprises at least one sub-imaging unit corresponding to the laser beam in the detection light beam.

[0021] The at least one sub-optical filter corresponds to the at least one sub-imaging unit one-to-one, and is located at the light entrance side of the corresponding sub-imaging unit.

[0022] Optionally, the detection light beam further comprises a second laser beam of a second wavelength and a third laser beam of a third wavelength, the first wavelength, the second wavelength and the third wavelength are different.

[0023] The optical filter comprises three sub-optical filters, and the transmission wavelengths of the three sub-optical filters comprise the first wavelength, the second wavelength and the third wavelength respectively.

[0024] Optionally, the first wavelength is 660 nm, the second wavelength is 520 nm, and the third wavelength is 940 nm.

[0025] The bandwidth of the sub-filter ranges from 10nm to 20nm, inclusive of the endpoints.

[0026] Optionally, the device body further comprises a light homogenizing unit and a spatial light modulation unit, and the laser light source is further configured to emit a fourth laser beam of a fourth wavelength, the fourth wavelength being different from the first wavelength, the second wavelength and the third wavelength.

[0027] The imaging health indicator detection device realizes a first function based on the detection beam, the lens unit and the detection part, the first function including forming the target image and acquiring the health indicator of the detection target; wherein the detection beam is transmitted through the light homogenizing unit and the spatial light modulation unit in sequence, and is transmitted to the target area by the lens unit.

[0028] The imaging health indicator detection device further realizes a second function based on the first laser beam, the second laser beam and the fourth laser beam, and the light homogenizing unit, the spatial light modulation unit and the lens unit, the second function including a projection function to project and display the target image and the acquired health indicator of the detection target; wherein the first laser beam, the second laser beam and the fourth laser beam are transmitted through the light homogenizing unit, the spatial light modulation unit and the lens unit in sequence.

[0029] Optionally, the fourth wavelength is 465nm.

[0030] Optionally, a second driving unit is further included.

[0031] The device body is mounted on the second driving unit, and the second driving unit is configured to drive the device body to expand the range of the target area in the detection target.

[0032] Optionally, the detection part further comprises a data sending unit.

[0033] The data sending unit is in communication connection with the imaging unit, and is configured to output the target image.

[0034] The data sending unit is further in communication connection with the processing unit, and is configured to output the acquired health indicator of the detection target.

[0035] Compared with the related art, the technical scheme of the present application has the following advantages:

[0036] The detection device comprises a laser light source, a lens unit, an imaging unit and a filter. The filter is located on the transmission path of the reflected light beam and on the light entrance side of the imaging unit. The transmission wavelength of the filter can include the wavelength of the detection light beam. The laser light source emits the detection light beam. The lens unit focuses the detection light beam on the target region of the detection target, so that the detection light beam can be transmitted to the preset depth of the target region and reflected to form a reflected light beam at the preset depth of the target region. The reflected light beam is transmitted to the imaging unit through the filter. The imaging unit obtains a target image and a detection signal based on the reflected light beam. The target image can represent the blood flow distribution at the preset depth of the target region. The detection signal can represent the change of the light intensity of the reflected light beam at the preset depth of the target region within a preset time. The processing unit obtains the health index of the detection target based on the detection signal. That is, the detection device can obtain the detection image of the detection target and the health index of the detection target.

[0037] In addition, since the detection light beam is a laser light beam, it has high directivity and energy concentration characteristics, low scattering loss and strong penetration ability. The laser light beam also has high monochromaticity and high signal-to-noise ratio. The signal-to-noise ratio and penetration ability of the detection light beam can be greatly improved. The requirements for the elements in the detection device can be effectively reduced, the cost can be reduced, the calculation pressure of the processing unit can be reduced, the detection time can be shortened, the detection speed can be improved, and more information of deeper tissues can be obtained to analyze more health index signals and obtain more health indexes. In addition, the laser light beam has high monochromaticity and high signal-to-noise ratio. The detection device further comprises a filter arranged on the light entrance side of the imaging unit. The signal-to-noise ratio of the detection light beam can be further improved. The clarity of the target image can be ensured. The PPG waveform signal has high signal-to-noise ratio, and the accuracy of the obtained health index can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application. Those skilled in the art can obtain other drawings according to the provided drawings without creating any creative labor.

[0039] The structures, proportions, sizes, etc. shown in the drawings of the present specification are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the conditions that can be implemented by the present application. Therefore, any modification of the structure, change of the proportion relationship or adjustment of the size, which does not affect the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0040] Figure 1 A structural schematic diagram of an imaging health indicator detection device provided in the present application is shown in FIG. 1.

[0041] Figure 2 A structural schematic diagram of another imaging health indicator detection device provided in the present application is shown in FIG. 2.

[0042] Figure 3 A structural schematic diagram of still another imaging health indicator detection device provided in the present application is shown in FIG. 3.

[0043] Figure 4 A schematic diagram of a filter curve of a filter is shown in FIG. 4.

[0044] Figure 5 A structural schematic diagram of still another imaging health indicator detection device provided in the present application is shown in FIG. 5.

[0045] Figure 6 A structural schematic diagram of still another imaging health indicator detection device provided in the present application is shown in FIG. 6. DETAILED DESCRIPTION

[0046] The embodiments in the present application will be described below in detail with the accompanying drawings of the embodiments in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0047] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with the accompanying drawings and specific embodiments.

[0048] As described in the background section, with the gradual popularization of health indicator detection devices, how to improve the reliability of the health indicator detection devices has become a key problem for those skilled in the art. The light source of the traditional detection device is an LED light source, and the LED light source has the disadvantages of large divergence angle, low energy density, poor penetration depth, etc. When disturbed by the outside world, it has a great influence on the detection result. Therefore, detection can only be performed close to the skin, and light leakage caused by not being close to the skin or movement will seriously affect the signal-to-noise ratio of the light signal received by the detector, and further affect the stability and reliability of the health indicators detected. Common disturbances include: (1) motion artifact: body movement causes changes in sensor-skin contact; (2) ambient light: external ambient light interferes with signal quality; (3) skin color / body fat difference: affects light absorption characteristics.

[0049] On this basis, in order to improve the signal-to-noise ratio and improve the accuracy of the health indicators, higher requirements will be placed on the elements used in the detection device, the cost will increase, and at the same time, the processing chip will also be subjected to greater computing pressure, affecting the computing speed.

[0050] Based on the above, the application provides an imaging health indicator detection device, as shown in Figure 1 Figure 1 The application provides a structural schematic diagram of an imaging health indicator detection device, which comprises a device body 100, which can comprise:

[0051] A laser light source 102 for emitting a detection light beam, which can at least include a first laser light beam of a first wavelength.

[0052] A lens unit 104, which can focus the detection light beam on a target region D of a detection target, so that the detection light beam can be transmitted to a preset depth of the target region D and reflected to form a reflected light beam at the preset depth of the target region D. Specifically, the detection light beam emitted by the laser light source 102 can be focused on the target region D of the detection target by the lens unit 104, and after being transmitted to the target region D, it is transmitted to the preset depth of the target region D after being transmitted and refracted in the target region D, and then reflected at the preset depth of the target region D to form a reflected light beam. It should be noted that the detection target can be a human body, and the target region D can be a certain part of the skin of the human body. However, the application is not limited thereto, and the above-mentioned detection target can also be an animal body, and the target region D can be a certain part of the skin of the animal body.

[0053] A detection part 200, which can comprise an imaging unit 202 and a filter 204, the filter 204 being located on the transmission path of the reflected light beam and on the light entrance side of the imaging unit 202, and the transmission wavelength of the filter can include the wavelength of the detection light beam. The reflected light beam is transmitted to the imaging unit 202 through the filter 204, and the imaging unit 202 obtains a target image and a detection signal based on the reflected light beam. Wherein, the target image can represent the blood flow distribution at the preset depth of the target region D, that is, the imaging unit 202 can obtain the blood flow distribution graph at the preset depth of the target region D, and the detection signal can represent the change of the light intensity of the reflected light beam at the preset depth of the target region D within a preset time. It should be noted that the detection signal can represent the change of the light intensity of the reflected light beam at the preset depth of the target region D within a preset time, so that the imaging unit 202 can obtain and output the detection signal of the PPG waveform based on the reflected light beam.

[0054] ​The detection part 200 further comprises a processing unit 206 configured to obtain a health index of the detection target based on the detection signal. Specifically, after the imaging unit 202 receives the reflected light beam, or in other words, after the reflected light beam is transmitted to the imaging unit 202, the imaging unit 202 can obtain and output a PPG waveform detection signal based on the reflected light beam, and the processing unit 206 can obtain a health index of the detection target based on the PPG waveform signal. It should be noted that the PPG waveform signal is the core output signal of photoplethysmography (PPG), and its form and characteristics directly reflect the changes in human physiological state. It can be used to obtain health indexes such as heart rate, blood oxygen saturation, blood pressure, etc., to realize the detection of health indexes, so that the processing unit 206 can obtain the health index of the detection target based on the detection signal.

[0055] As can be seen from the above, the detection device focuses the detection light beam on the target area through the lens unit 104, which can not only obtain a detection image (blood flow distribution map) at a preset depth of the target area, but also obtain a detection signal based on the reflected light beam of the detection light beam at the preset depth of the target area, and obtain a health index of the detection target based on the detection signal. That is, the detection device focuses the detection light beam on the target area through the lens unit 104, which can not only obtain a detection image of the detection target, but also obtain a health index of the detection target, and can be applied to more application scenarios, and has strong practicality.

[0056] In addition, the light source part of the detection device comprises a laser light source 102, so that the detection light beam is a laser light beam. It is known that the laser light beam has high directivity and energy concentration characteristics, and then has low scattering loss and strong penetration ability. At the same time, the laser light beam also has high monochromaticity and high signal-to-noise ratio, thereby greatly improving the signal-to-noise ratio and penetration ability of the detection light beam. Compared with the LED light source, the problem of low penetration depth and low signal-to-noise ratio is effectively solved, thereby effectively reducing the requirements for each element in the detection device, reducing the cost, and also relieving the calculation pressure of the processing unit 206, shortening the detection time, and improving the detection speed. Moreover, the laser light beam has strong penetration ability, and compared with the LED light source, it can obtain more information of the deeper tissues, and then can analyze more health index signals and obtain more health indexes to reflect the health level of the detection target from more aspects.

[0057] In addition, the laser light beam has high monochromaticity and high signal-to-noise ratio, which can also improve the signal-to-noise ratio of the detection light beam, thereby ensuring the clarity of the target image and ensuring the high signal-to-noise ratio of the PPG waveform signal, and improving the accuracy of the obtained health index. That is, the detection device can not only ensure the clarity of the target image, but also ensure the accuracy of the health index, thereby effectively improving the reliability and accuracy of the detection device.

[0058] It can be further known from the above that the detection device further comprises a filter 204 arranged on the light-incident side of the imaging unit 202, which can filter out light beams other than the detection light beam, so as to effectively avoid the light beams other than the detection light beam from entering the imaging unit 202, that is, to inhibit the interference light beams such as ambient light beams from entering the imaging unit 202. Experiments show that, under the premise that the detection light beam is a laser beam, in combination with the filtering effect of the filter 204, the signal-to-noise ratio (SNR) of the detection light beam emitted by the laser light source 102 can be increased to ≥45 dB under the interference of 105 lux white light, while the signal-to-noise ratio of the detection light beam emitted by a traditional LED light source is only 20-28 dB. Therefore, the laser beam combined with the filter film can greatly reduce the interference of ambient light, improve the signal-to-noise ratio of the detection light beam, and further ensure the clarity of the target image and the high signal-to-noise ratio of the PPG waveform signal, thereby effectively improving the reliability and accuracy of the detection device. At the same time, since the laser has high monochromaticity and high signal-to-noise ratio, it has strong anti-interference ability, and the detection device is further provided with the filter 204 on the light-incident side of the imaging unit 202. Even if the detection device is not in close contact with the target area or does not form a sealed space with the target area, it can also avoid the light beams other than the detection light beam from entering the imaging unit 202. Therefore, the detection device can realize non-contact remote sensing health index detection, so as to be capable of more application scenarios and have strong practicability.

[0059] It should be noted that the ambient light is a continuous light beam, and the illumination intensity of the light beam in any narrow wavelength range in the ambient light is lower than the illumination intensity of the ambient light, that is, even if the part of the ambient light with the same wavelength as the detection light beam enters the imaging unit 202, due to its low illumination intensity, that is, low light intensity, the influence on the signal-to-noise ratio of the detection light beam is small, and the high signal-to-noise ratio of the PPG waveform formed by the detection light beam can still be ensured, thereby ensuring the accuracy of the obtained health index.

[0060] In addition, the laser also has the advantages of fast response speed and multi-parameter expansion. Based on the fast response (modulation bandwidth > 1 MHz) of the laser, fast signal acquisition can be supported, so that the detection device can adapt to real-time monitoring in dynamic scenes, and the delay can be controlled within 10 ms. Based on the multi-parameter expansion of the laser, such as light intensity and wavelength, multiple health indicators (such as blood glucose trend and lactic acid level) can be detected simultaneously through laser spectrum analysis, which provides the possibility for the intelligent development of emergency equipment.

[0061] In an embodiment of the present application, the imaging unit 202 can include a plurality of pixels arranged in M rows and N columns, and M and N are integers greater than 1.

[0062] The imaging unit 202 can acquire a target image based on the reflected light beams. The target image can be a blood flow distribution map at a preset depth of the target region. Specifically, based on the pixels in the imaging unit 202, the target region can include a plurality of imaging regions, each of which corresponds to at least part of the plurality of pixels. Each pixel can collect reflected light beams of the imaging region corresponding thereto, generate an optical signal based on the collected reflected light beams, and the intensity of the optical signal generated by each pixel is positively correlated with the light intensity of the reflected light beams collected thereby, that is, the intensity of the optical signal generated by each pixel is proportional to the light intensity of the reflected light beams of the imaging region corresponding thereto, so that the target image can be acquired based on the reflected light beams. It should be noted that the plurality of imaging regions correspond one-to-one to at least part of the plurality of pixels can be understood as follows: if the area of the target region is not less than the imaging range of the imaging unit 202, the plurality of imaging regions in the target region correspond one-to-one to the plurality of pixels; if the area of the target region is less than the imaging range of the imaging unit 202, the plurality of imaging regions in the target region correspond one-to-one to part of the plurality of pixels.

[0063] It is known that the intensity of the optical signal generated by the pixel is positively correlated with the light intensity of the reflected light beams collected thereby, that is, the pixel can be a photosensitive device similar to a photodiode, that is, the imaging unit 202 can be an imaging element including a photosensitive device similar to a photodiode. If the light intensity of the collected reflected light beams is large, the light intensity of the optical signal generated by the pixel is also large, and vice versa. Thus, different intensities of optical signals can be generated according to the intensity of the collected reflected light beams, and the image of the target region can be obtained according to the optical signal generated by the pixel, that is, the target image can be obtained, which can be a blood flow distribution map at a preset depth of the target region, representing the blood flow distribution information at the preset depth of the target region. The specific working process can be as follows: the imaging unit 202 responds to a control signal to collect reflected light beams of each imaging region in the target region at a certain time, generate an optical signal based on the collected reflected light beams, acquire a target image of the target region, that is, acquire a real-time blood flow distribution map or a blood flow distribution map at a specific time of the target region, and further acquire real-time blood flow distribution information or blood flow distribution information at a specific time of the target region. The blood flow distribution information can be used for angiography, disease screening, etc.

[0064] In one embodiment of this application, the imaging unit 202 acquires a detection signal based on a reflected light beam. This detection signal can characterize the light intensity change of the reflected light beam at a preset depth in the target area within a preset time. Specifically, at least one of the multiple pixels in the imaging unit 202 responds to a control signal and forms a detection signal based on the acquired reflected light beam within a preset time. That is, one or more pixels in the imaging unit 202 can continuously acquire the reflected light beam of their corresponding imaging area within a preset time based on a control signal, and generate a corresponding light signal based on the acquired reflected light beam within the preset time, thereby acquiring light intensity change data over a period of time, thus obtaining the detection signal. Based on the detection signal acquired by the one or more pixels, the processing unit 206 can acquire the light intensity change curve of the light signal corresponding to each pixel in the one or more pixels. Based on the obtained light intensity change curve, the number of peaks in the curve can be counted to obtain health indicators such as heart rate.

[0065] In this embodiment, the processing unit 206 can obtain the light intensity change curve of the light signal of a pixel within a preset time period based on the detection signal acquired by a pixel within a preset time period, and then obtain health indicators such as heart rate. Alternatively, the processing unit 206 can obtain multiple light intensity change curves based on the detection signals acquired by multiple pixels within a preset time period, take the average of the light intensity change data of these multiple pixels, and then plot the light intensity change curve to obtain a smoother and more accurate light intensity change curve, thereby obtaining health indicators such as heart rate more accurately.

[0066] It should be noted that the control signals for acquiring the target image and the control signals for acquiring the detection signals can come from the processing unit 206 or from external control elements. This application does not limit this and it depends on the specific circumstances.

[0067] Based on any of the above embodiments, in one embodiment of this application, the imaging unit 202 can be a CCD camera or a CMOS camera. However, this application does not limit this and it depends on the specific circumstances.

[0068] In one embodiment of this application, such as Figure 2 As shown, Figure 2 The schematic diagram of a health indicator detection device provided in this application shows that the filter 204 may include at least one sub-filter, each sub-filter corresponding to a laser beam in the detection beam, and the transmission wavelength of each sub-filter corresponding to the wavelength of one type of laser beam in the detection beam. In other words, the filter 204 includes sub-filters corresponding to laser beams in the detection beam, and each sub-filter transmits only one type of laser beam in the detection beam, so that the filter 204 can filter out beams other than the detection beam.

[0069] The bandwidth of the sub-filter ranges from 10nm to 20nm, inclusive. That is, the passband of the sub-filter can be narrow, which is a narrowband filter. The monochromaticity of the reflected light beam transmitted through the sub-filter to the imaging unit 202 is better, the signal-to-noise ratio is higher, and the accuracy of the acquired health indicators is ensured.

[0070] In an embodiment of the present application, as shown in Figure 2 The detection device can further include a first driving unit 300 for driving any one of the at least one sub-filter to the light entrance side of the imaging unit 202 to filter the reflected light beam, or for sequentially driving part or all of the at least one sub-filter to the light entrance side of the imaging unit 202. For example Figure 2 The first driving unit 300 can drive the corresponding sub-filter to the light entrance surface of the imaging unit 202 by rotation, but the present application does not limit this, and the specific implementation is determined as appropriate.

[0071] Specifically, if the laser light source 102 emits one laser light beam, the first driving unit 300 is configured to drive the sub-filter corresponding to the laser light beam in the at least one sub-filter to the light entrance side of the imaging unit 202; if the laser light source 102 sequentially emits at least two laser light beams in the detection light beam, the first driving unit 300 is configured to sequentially drive the sub-filters corresponding to the at least two laser light beams in the at least one sub-filter to the light entrance side of the imaging unit 202 according to the emission order of the at least two laser light beams; if the laser light source 102 sequentially emits all laser light beams in the detection light beam, the first driving unit 300 is configured to sequentially drive the at least one sub-filter to the light entrance side of the imaging unit 202 according to the emission order of each laser light beam in the detection light beam, to realize filtering of the reflected light beam formed based on the detection light beam, and to suppress transmission of light beams other than the detection light beam to the imaging unit 202, which affects the detection result.

[0072] Furthermore, based on the above, the first driving unit 300 can drive the corresponding sub-filter to the light entrance side of the imaging unit 202 based on the laser light beam emitted by the laser light source 102, that is, there will be no case where two or more laser light beams are transmitted to the imaging unit 202 through the same filter 204, so that the imaging unit 202 images or acquires a detection signal based on only one laser light beam in the detection light beam each time, thereby avoiding mutual interference between different laser light beams in the detection light beam, and improving the accuracy of the acquired health indicators.

[0073] In an embodiment of the present application, as shown in Figure 3 Figure 3 ​As shown in a structural schematic diagram of an imaging health detection device provided in the present application, the imaging unit 202 can include at least one sub-imaging unit corresponding to each laser beam in the detection light beam. It can also be understood that the detection part 200 can include a plurality of imaging units 202 corresponding to each laser beam in the detection light beam.

[0074] Since one sub-filter corresponds to only one laser beam in the detection light beam, if the detection part 200 includes a plurality of imaging units 202 corresponding to each laser beam in the detection light beam, at least one sub-filter corresponds to at least one sub-imaging unit and is located on the light-in side of the corresponding sub-imaging unit to filter the reflected light beam formed based on the detection light beam, so as to avoid the transmission of light beams other than the detection light beam to the imaging unit 202, thereby ensuring the accuracy of the obtained health indicators.

[0075] In an embodiment of the present application, the detection light beam further includes a second laser beam of a second wavelength, and a third laser beam of a third wavelength. The first wavelength can be 660 nm, the second wavelength can be 520 nm, and the third wavelength can be 940 nm, i.e., the detection light beam can include laser beams of red light (first laser beam), green light (second laser beam), and infrared light (third laser beam). However, the present application is not limited thereto, and the above detection light beam can also include laser beams of other wavelengths, which is determined according to the situation.

[0076] Based on the first laser beam, the second laser beam, and the third laser beam, the transmittance curve of the filter 204 can be as shown in FIG. 2B. It should be noted that, Figure 4 Figure 4 The transmittance curve is only a schematic diagram, but in actuality, the transmittance of different light beams can be the same or different.

[0077] It should be noted that the absorption rate of hemoglobin to red light and green light is high, so when the red light or green light penetrates the skin and tissue, it will be absorbed by the hemoglobin in the blood, and the remaining light will be reflected and received by the imaging unit 202 (such as a photodiode) and converted into a light signal. When the heart beats, the blood flows in the blood vessels, causing the local blood volume to change, the amount of hemoglobin to change, and thus the amount of light absorbed by the hemoglobin to change, and the intensity of the reflected light beam also fluctuates. The intensity of the light signal formed based on the reflected light beam by the imaging unit 202 also changes. Based on the change in the light intensity of the light signal within a period of time, a detection signal can be obtained, and based on the detection signal, the heart rate of the detection target per minute can be calculated.

[0078] ​The blood oxygen saturation (SpO2) can be defined as the percentage of oxygenated hemoglobin (HbO2) in total hemoglobin (Hb+HbO2), and the oxygenated hemoglobin (HbO2) has strong absorption to infrared light (850nm~940nm) and weak absorption to red light (600nm~750nm), and the deoxygenated hemoglobin (Hb) is opposite, which has strong absorption to red light and weak absorption to infrared light. Combined with the difference in red light and infrared light absorption, the proportion of oxygenated hemoglobin in blood can be calculated, and then the blood oxygen saturation can be obtained.

[0079] Based on the above, the detection device can obtain the heart rate of the detection target by detecting at least one of the first laser beam and the second laser beam in the detection light beam, and can also obtain the blood oxygen saturation of the detection target by the first laser beam and the third laser beam. It should be noted that the method adopted by the detection device to obtain the above-mentioned heart rate and blood oxygen saturation and the specific calculation principle and process can be the same as the method adopted by the existing LED light source detection device, which will not be described here.

[0080] In an embodiment of the present application, the laser light source 102 is also used to emit a fourth laser beam of a fourth wavelength, and the fourth wavelength is different from the first wavelength, the second wavelength and the third wavelength, that is, the wavelengths of the first laser beam, the second laser beam, the third laser beam and the fourth laser beam are different, that is, the wavelength of the fourth laser beam is different from the wavelength of the detection light beam.

[0081] The health index detection device can realize the health index detection function of the detection target based on the detection light beam and the detection part 200, such as obtaining the above-mentioned heart rate and blood oxygen saturation. When the detection device realizes the health index detection function, the detection light beam is transmitted by the uniform light unit 106 and the spatial light modulation unit 108 in turn, and is transmitted to the target area by the lens unit 104.

[0082] As shown in Figure 5 , the health index detection device can realize the health index detection function of the detection target based on the detection light beam and the detection part 200, such as obtaining the above-mentioned heart rate and blood oxygen saturation. When the detection device realizes the health index detection function, the detection light beam is transmitted by the uniform light unit 106 and the spatial light modulation unit 108 in turn, and is transmitted to the target area by the lens unit 104. Figure 5This is a schematic diagram of an imaging health detection device provided in this application. The device body 100 also includes a light-uniforming unit 106 and a spatial light modulation unit 108. This detection device can utilize a first laser beam, a second laser beam, and a fourth laser beam, along with the light-uniforming unit 106, the spatial light modulation unit 108, and the lens unit 104, to achieve a projection function, displaying the acquired health indicators and target images of the detection target, thus adapting to more application scenarios. In addition, based on the first laser beam, the second laser beam, and the fourth laser beam, along with the light-uniforming unit 106, the spatial light modulation unit 108, and the lens unit 104, the detection device can also achieve projection functions other than projecting health indicators, such as projecting images or animations. Specifically, when the detection device performs a projection function, the first laser beam, the second laser beam, and the fourth laser beam are transmitted sequentially through the light-uniforming unit 106, the spatial light modulation unit 108, and the lens unit 104.

[0083] It should be noted that the homogenizing unit 106 may include an aspherical lens, a compound eye lens, a light bar, and a diffractive optical element (DOE). The spatial light modulation unit 108 may be a digital micromirror device (DMD), a liquid crystal, or a liquid crystal on silicon (LCOS). The bandpass range of the lens unit 104 is 400nm~1100nm.

[0084] Optionally, the fourth wavelength can be 465nm, but this application does not limit it and it depends on the specific circumstances.

[0085] In one embodiment of this application, such as Figure 6 As shown, Figure 6 This is a schematic diagram of an imaging health detection device provided in this application. The device further includes a second driving unit 400, and the device body 100 is mounted on the second driving unit 400. The second driving unit 400 can drive the device body 100, thereby scanning the detection target by moving the device body, expanding the imaging range of the device body 100 when detecting the detection target, and increasing the range of the target area within the detection target. This allows the device body to even image the entire area of ​​the detection target and acquire detection signals based on the entire area of ​​the detection target, enabling the detection device to achieve the same purpose as CT or MRI equipment, and thus has strong practical value.

[0086] In addition, in order to realize a larger imaging range, the imaging unit 202 in the detection device can also be designed as an imaging element with a larger imaging angle, but the specific type and model of the imaging unit 202 is not limited in the present application, and is determined according to the situation.

[0087] In an embodiment of the present application, the detection part 200 further comprises a data sending unit (not shown in the figure), such as Bluetooth, etc., which is in communication connection with the processing unit 206, and is used to output the acquired health indicators of the detection target. For example, the acquired health indicators of the detection target can be sent to a computer, a mobile phone or other electronic devices through the data sending unit for storage or viewing, etc.

[0088] In summary, the present application provides an imaging health detection device, which comprises a laser light source, a lens unit, an imaging unit and a filter. The filter is located on the transmission path of the reflected light beam and on the light entrance side of the imaging unit, and the transmission wavelength of the filter can include the wavelength of the detection light beam. The laser light source emits a detection light beam, the lens unit focuses the detection light beam on a target region of a detection target, so that the detection light beam can be transmitted to a preset depth of the target region and reflected to form a reflected light beam at the preset depth of the target region. The reflected light beam is transmitted to the imaging unit through the filter, and the imaging unit acquires a target image and a detection signal based on the reflected light beam. The target image can represent the blood flow distribution at the preset depth of the target region, and the detection signal can represent the change of the light intensity of the reflected light beam at the preset depth of the target region within a preset time. The processing unit acquires the health indicators of the detection target based on the detection signal. That is, the detection device can acquire both the detection image and the health indicators of the detection target.

[0089] In addition, since the detection light beam is a laser light beam, it has high directivity and energy concentration characteristics, and thus has low scattering loss and strong penetration ability. In addition, the laser light beam has high monochromaticity and high signal-to-noise ratio, which can greatly improve the signal-to-noise ratio and penetration ability of the detection light beam, thereby effectively reducing the requirements for the elements in the detection device, reducing the cost, relieving the computing pressure of the processing unit, shortening the detection time, improving the detection speed, and obtaining more information of deeper tissues to analyze more health indicator signals and obtain more health indicators. In addition, the laser light beam has high monochromaticity and high signal-to-noise ratio, and the detection device further comprises a filter arranged on the light entrance side of the imaging unit, which can further improve the signal-to-noise ratio of the detection light beam, thereby ensuring the clarity of the target image and the high signal-to-noise ratio of the PPG waveform signal, and improving the accuracy of the acquired health indicators.

[0090] Various embodiments are described in the specification in a progressive and / or concurrent manner, each embodiment emphasizing different aspects and embodiments, which provide their respective benefits. The same can apply to the corresponding method embodiments as well. For the devices disclosed by the embodiments, as they have corresponding relationship with the methods disclosed by the embodiments, the description is relatively simple and the relevant part can be referred to the method part.

[0091] It should be noted that, in the description of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there can be a component disposed therebetween.

[0092] It should also be noted that, in this document, relational terms such as first and second, and the like, are used solely to distinguish one entity or action from another entity or action, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements recited, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0093] The above description of disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An imaging health indicator detection device, comprising: The device comprises: a device body; the device body comprises: a laser light source for emitting a detection light beam, the detection light beam comprising at least a first laser light beam of a first wavelength; a lens unit for focusing the detection light beam on a target region of a target object, so that the detection light beam is transmitted to a preset depth of the target region and reflected to form a reflected light beam at the preset depth of the target region; a detection part comprising an imaging unit and a filter, the filter being located on the transmission path of the reflected light beam and on the light entrance side of the imaging unit, the transmission wavelength of the filter comprising the wavelength of the detection light beam; the reflected light beam is transmitted to the imaging unit through the filter, the imaging unit acquires a target image and a detection signal based on the reflected light beam, the target image representing the blood flow distribution at the preset depth of the target region, and the detection signal representing the change of the light intensity of the reflected light beam at the preset depth of the target region within a preset time; the detection part further comprises a processing unit for acquiring a health index of the target object based on the detection signal; wherein the imaging unit comprises a plurality of pixels arranged in M rows and N columns, M and N being integers greater than 1; the target region comprises a plurality of imaging regions, the plurality of imaging regions one-to-one corresponding to at least part of the plurality of pixels, each pixel in the plurality of pixels collects the reflected light beam of the imaging region corresponding thereto and generates an optical signal based on the collected reflected light beam, the intensity of the optical signal generated by the pixel being proportional to the light intensity of the collected reflected light beam to acquire the target image; at least one of the plurality of pixels in the imaging unit generates an optical signal based on the collected reflected light beam within the preset time in response to a control signal to acquire the detection signal; wherein the detection signal is a PPG waveform signal, and the processing unit acquires the health index of the target object based on the detection signal acquired by the at least one pixel.

2. The imaging health indicator detection device of claim 1, wherein, The imaging unit is a CCD camera or a CMOS camera.

3. The imaging health indicator detection device of claim 1, wherein, The filter comprises at least one sub-filter, the at least one sub-filter one-to-one corresponding to a laser light beam in the detection light beam, and the transmission wavelength of each sub-filter in the at least one sub-filter corresponding to the wavelength of one laser light beam in the detection light beam.

4. The imaging health indicator detection device of claim 3, wherein, It further comprises a first driving unit; the first driving unit drives any one of the at least one sub-filter to the light entrance side of the imaging unit; or the first driving unit sequentially drives part or all of the at least one sub-filter to the light entrance side of the imaging unit in order.

5. The imaging health indicator detection device of claim 3, wherein, The imaging unit comprises at least one sub-imaging unit corresponding to a laser light beam in the detection light beam; the at least one sub-filter one-to-one corresponds to the at least one sub-imaging unit and is located on the light entrance side of the corresponding sub-imaging unit.

6. The imaging-based health indicator detection device of any one of claims 3-5, wherein, The detection light beam further comprises a second laser light beam of a second wavelength and a third laser light beam of a third wavelength, the first wavelength, the second wavelength and the third wavelength being different; The filter comprises three sub-filters, and the transmission wavelengths of the three sub-filters respectively comprise the first wavelength, the second wavelength and the third wavelength.

7. The imaging health indicator detection device of claim 6, wherein, The first wavelength is 660nm, the second wavelength is 520nm, and the third wavelength is 940nm. The bandwidth of the sub-filter ranges from 10nm to 20nm, inclusive.

8. The imaging health indicator detection device of claim 6, wherein, The device body further comprises a light homogenizing unit and a spatial light modulation unit, and the laser light source is further used to emit a fourth laser beam of a fourth wavelength, which is different from the first wavelength, the second wavelength and the third wavelength. The imaging health indicator detection device realizes a first function based on the detection beam, the lens unit and the detection part, and the first function comprises forming the target image and acquiring the health indicator of the detection target; wherein the detection beam is transmitted through the light homogenizing unit and the spatial light modulation unit in sequence, and is transmitted to the target area by the lens unit. The imaging health indicator detection device further realizes a second function based on the first laser beam, the second laser beam and the fourth laser beam, and the light homogenizing unit, the spatial light modulation unit and the lens unit, and the second function comprises a projection function to project and display the target image and the acquired health indicator of the detection target; wherein the first laser beam, the second laser beam and the fourth laser beam are transmitted through the light homogenizing unit, the spatial light modulation unit and the lens unit in sequence.

9. The imaging health indicator detection device of claim 8, wherein, The fourth wavelength is 465nm.

10. The imaging health indicator detection device of claim 1, wherein, Further comprising a second driving unit; The device body is mounted on the second driving unit, and the second driving unit is used to drive the device body to expand the range of the target area in the detection target.

11. The imaging health indicator detection device of claim 1, wherein, The detection part further comprises a data sending unit; The data sending unit is in communication connection with the imaging unit and is used to output the target image; The data sending unit is also in communication connection with the processing unit and is used to output the acquired health indicator of the detection target.

Images