Imaging type health index detection device

Abstract

The invention provides an imaging type health index detection device, and relates to the technical field of medical detection equipment, the imaging type health index detection device comprises a laser light source, a lens unit, an imaging unit and an optical filter, the optical filter is located on a transmission path of a reflected light beam and located on the light incident side of the imaging unit, and the transmission wavelength of the optical filter comprises the wavelength of a detection light beam. The laser light source emits a detection light beam, the lens unit focuses the detection light beam on a target area of a detection target, so that the detection light beam can transmit the target area to a preset depth and is reflected at the preset depth of the target area to form a reflected light beam, and the reflected light beam is transmitted to the imaging unit through the optical filter. The imaging unit acquires 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 area, the detection signal represents the light intensity change of the reflected light beam at the preset depth of the target area within the preset time, and the processing unit obtains the health index of the detection target based on the detection signal.

Description

Technical Field

[0001] This application relates to the technical field of medical detection equipment, and particularly to an imaging type detection index detection device. Background Art

[0002] With the improvement of living standards, people pay more and more attention to their own health levels. For example, health indicators such as heart rate, blood oxygen, blood sugar, and blood pressure have led to the emergence of various detection devices for health indicators, which have gradually spread into people's daily lives.

[0003] With the gradual popularization of health indicator detection devices, how to improve the reliability of health indicator detection devices, that is, how to improve the accuracy of the obtained health indicators, has become a key issue for those skilled in the art. Summary of the Invention

[0004] In view of this, this application provides an imaging type health indicator detection device, and the solution is as follows:

[0005] An imaging type health indicator detection device includes: a device body;

[0006] The device body includes:

[0007] A laser light source for emitting a detection light beam, and the detection light beam at least includes a first laser beam with a first wavelength;

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

[0009] A detection part, which includes an imaging unit and a filter. The filter is located on the transmission path of the reflected light beam and on the light incident side of the imaging unit. The transmission wavelength of the filter includes the wavelength of the detection light beam; the reflected light beam is transmitted to the imaging unit through the filter, and 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 area, and the detection signal represents the light intensity change of the reflected light beam at the preset depth of the target area within a preset time;

[0010] The detection part further includes a processing unit, and the processing unit obtains the health indicator of the detection target based on the detection signal.

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

[0012] The target area includes a plurality of imaging areas, which correspond one by one to at least part of the plurality of pixels. Each pixel in the plurality of pixels collects the reflected light beam of its corresponding imaging area 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 reflected light beam it collects, so as to obtain the target image.

[0013] Optionally, at least one of the plurality of pixels in the imaging unit responds to a control signal and generates an optical signal based on the reflected light beam it collects within the preset time, 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 filter includes at least one sub-filter, and the at least one sub-filter corresponds one by one to the laser beams in the detection light beam, and the transmission wavelength of each sub-filter in the at least one sub-filter corresponds to the wavelength of one of the laser beams in the detection light beam.

[0017] Optionally, it further includes a first driving unit;

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

[0019] The first driving unit drives some or all of the at least one sub-filters to the light incident side of the imaging unit in sequence.

[0020] Optionally, the imaging unit includes at least one sub-imaging unit corresponding one by one to the laser beams in the detection light beam;

[0021] The at least one sub-filter corresponds one by one to the at least one sub-imaging unit and is located on the light incident side of the corresponding sub-imaging unit.

[0022] Optionally, the detection light beam further includes a second laser beam with a second wavelength and a third laser beam with a third wavelength, and the first wavelength, the second wavelength and the third wavelength are different;

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

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

[0025] The value range of the bandwidth of the sub-filter is 10 nm to 20 nm, including the endpoint values.

[0026] Optionally, the device body further includes a light homogenizing unit and a spatial light modulation unit, and the laser light source is further configured to emit a fourth laser beam with a fourth wavelength, which is different from the first wavelength, the second wavelength, and the third wavelength;

[0027] The imaging type health index detection device realizes a first function based on the detection beam, the lens unit, and the detection part, and the first function includes forming the target image and obtaining the health index of the detection target; wherein, the detection beam is sequentially transmitted through the light homogenizing unit and the spatial light modulation unit, and is transmitted to the target area by the lens unit;

[0028] The imaging type health index detection device further realizes a second function based on the first laser beam, the second laser beam, and the fourth laser beam, as well as the light homogenizing unit, the spatial light modulation unit, and the lens unit, and the second function includes a projection function for projecting and displaying the target image and the obtained health index of the detection target; wherein, the first laser beam, the second laser beam, and the fourth laser beam are sequentially transmitted through the light homogenizing unit, the spatial light modulation unit, and the lens unit.

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

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

[0031] The device body is installed 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 includes a data sending unit;

[0033] The data sending unit is communicatively connected to the imaging unit and is configured to output the target image;

[0034] The data sending unit is also communicatively connected to the processing unit and is configured to output the obtained health index of the detection target.

[0035] Compared with the related art, the beneficial effects of the technical solution of this application are as follows:

[0036] The detection device includes: 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 incident side of the imaging unit. The transmission wavelength of the filter may include the wavelength of the detection light beam. Among them, the laser light source emits a detection light beam, and the lens unit focuses the detection light beam on the target area of the detection target, enabling the detection light beam to penetrate the target area to a preset depth and reflect at the preset depth of the target area to form a reflected light beam. 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 characterize the blood flow distribution at the preset depth of the target area, and the detection signal can characterize the change in the light intensity of the reflected light beam at the preset depth of the target area within a preset time. The processing unit obtains the health index of the detection target based on the detection signal. That is to say, the detection device can both acquire 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 beam, it has the characteristics of high directivity and energy concentration. Consequently, the scattering loss is low and the penetration ability is strong. At the same time, the laser beam also has high monochromaticity and a high signal-to-noise ratio, which can greatly improve the signal-to-noise ratio and penetration ability of the detection light beam. Furthermore, it can effectively reduce the requirements for each component in the detection device, reduce costs, relieve the computational pressure on the processing unit, shorten the detection time, improve the detection speed, and can obtain tissue information deeper inside to analyze more health index signals and obtain more health indexes. At the same time, the laser beam has high monochromaticity and a high signal-to-noise ratio, and the detection device also includes a filter arranged on the light incident side of the imaging unit, which can further improve the signal-to-noise ratio of the detection light beam. Thus, it can ensure the clarity of the target image and also ensure a high signal-to-noise ratio of the PPG waveform signal, improving the accuracy of the obtained health indexes. Description of the Drawings

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the provided drawings.

[0039] The structures, ratios, sizes, etc. depicted in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present application can be implemented. Therefore, they do not have a substantial technical meaning. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present application can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present application.

[0040] Figure 1 Structural schematic diagram of an imaging health index detection device provided by the present application;

[0041] Figure 2 Structural schematic diagram of another imaging health index detection device provided by the present application;

[0042] Figure 3 Structural schematic diagram of yet another imaging health index detection device provided by the present application;

[0043] Figure 4 Schematic diagram of the filter curve of the filter;

[0044] Figure 5 Structural schematic diagram of yet another imaging health index detection device provided by the present application;

[0045] Figure 6 Structural schematic diagram of yet another imaging health index detection device provided by the present application. Detailed implementation manners

[0046] Next, the embodiments in the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application.

[0047] To make the above objects, features, and advantages of the present application more obvious and understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0048] As described in the background art section, with the gradual popularization of health index detection devices, how to improve the reliability of health index detection devices has become a key issue for those skilled in the art. The light source of traditional detection devices is an LED light source, and the LED light source has disadvantages such as a large divergence angle, low energy density, and poor penetration depth. When affected by external interference, it has a great impact on the detection results. Therefore, it can only be detected close to the skin, and light leakage caused by not being closely attached or movement will seriously affect the signal-to-noise ratio of the optical signal received by the detector, thereby affecting the stability and reliability of the detected health index. Common interferences include: (1) Motion artifacts: Body movement causes changes in the contact between the sensor and the skin; (2) Ambient light: External ambient light interferes with the signal quality; (3) Skin color / fat difference: Affects the light absorption characteristics.

[0049] On this basis, in order to improve the signal-to-noise ratio and the accuracy of health indicators, higher requirements will be placed on the components used in the detection device, resulting in an increase in cost. At the same time, it also brings greater computational pressure to the processing chip, affecting the computational speed.

[0050] Based on the above, the present application provides an imaging type health index detection device, as Figure 1 shown, Figure 1 which is a schematic structural diagram of an imaging type health index detection device provided by the present application. The detection device includes: a device body 100, and the device body 100 may include:

[0051] a laser light source 102, which is used to emit a detection light beam, and the detection light beam may at least include a first laser beam with a first wavelength.

[0052] a lens unit 104, which can focus the detection light beam on a target area D of a detection target, so that the detection light beam can transmit through the target area D to a preset depth, and be reflected at the preset depth of the target area D to form a reflected light beam. Specifically, the detection light beam emitted by the laser light source 102 can be focused on the target area D of the detection target through the lens unit 104, and after being transmitted to the target area D, it is transmitted through the target area D to the preset depth of the target area D through transmission and refraction, and then is reflected at the preset depth of the target area D to form a reflected light beam. It should be noted that the detection target may be a human body, and the target area D may be a certain part of the human skin. However, the present application does not limit this. The above detection target may also be an animal body, and the target area D may be a certain part of the animal skin.

[0053] a detection part 200, and the detection part 200 may include an imaging unit 202 and a filter 204. The filter 204 is located on the transmission path of the reflected light beam and on the light incident side of the imaging unit 202, and the transmission wavelength of the filter may 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. Among them, the target image may represent the blood flow distribution at the preset depth of the target area D, that is, the imaging unit 202 can obtain a blood flow distribution map at the preset depth of the target area D, and the detection signal may represent the light intensity change of the reflected light beam at the preset depth of the target area D within a preset time. It should be noted that the detection signal may represent the light intensity change of the reflected light beam at the preset depth of the target area D within a preset time, so that the imaging unit 202 can obtain and output a detection signal in the form of a PPG waveform based on the reflected light beam.

[0054] The detection part 200 further includes a processing unit 206, and the processing unit 206 obtains the health indicators of the detection target based on the detection signal. Specifically, after the imaging unit 202 receives the reflected light beam, or rather, after the reflected light beam is transmitted to the imaging unit 202, the imaging unit 202 can obtain and output a detection signal of the PPG waveform based on the reflected light beam, and the processing unit 206 can obtain the health indicators 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 (abbreviated as PPG), and its shape and characteristics directly reflect the changes in the human physiological state, and can be used to obtain health indicators such as heart rate, blood oxygen saturation, and blood pressure, so as to realize the detection of health indicators. Therefore, the processing unit 206 can obtain the health indicators 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, and can not only obtain the detection image (blood flow distribution map) at the preset depth of the target area, but also obtain the detection signal based on the reflected light beam at the preset depth of the target area in the target area, and obtain the health indicators of the detection target based on the detection signal. That is to say, the detection device focuses the detection light beam on the target area through the lens unit 104, and can not only obtain the detection image of the detection target, but also obtain the health indicators of the detection target, and can be applied to more application scenarios, with strong practicability.

[0056] In addition, the light source part of the detection device includes 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 the characteristics of high directivity and energy concentration, 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, so that the signal-to-noise ratio and penetration ability of the detection light beam are greatly improved. Compared with the LED light source, the problems of low penetration depth and low signal-to-noise ratio are effectively solved. Furthermore, the requirements for each component in the detection device can be effectively reduced, the cost can be reduced, the computing pressure on the processing unit 206 can be relieved, the detection time can be shortened, and the detection speed can be improved. And the laser light beam has strong penetration ability. Compared with the LED light source, it can obtain tissue information deeper, and then can analyze more health indicator signals, obtain more health indicators, so as to be able to reflect the health level of the detection target from more aspects.

[0057] Also, because the laser light beam has high monochromaticity and high signal-to-noise ratio, it can also improve the signal-to-noise ratio of the detection light beam. Furthermore, the clarity of the target image can be ensured, and the high signal-to-noise ratio of the PPG waveform signal can also be ensured, improving the accuracy of the obtained health indicators. That is to say, the detection device can not only ensure the clarity of the target image, but also ensure the accuracy of the health indicators, so as to effectively improve the reliability and accuracy of the detection device.

[0058] As can also be seen from the above, the detection device further includes a filter 204 disposed on the light incident side of the imaging unit 202. The filter 204 can filter out light beams other than the detection beam, effectively preventing light beams other than the detection beam from entering the imaging unit 202, that is, it can suppress the entry of interfering light beams such as ambient light into the imaging unit 202. Experiments show that on the premise that the detection beam is a laser beam, combined with the filtering effect of the filter 204, under the interference of 105 lux white light, the signal-to-noise ratio (SNR) of the detection beam emitted by the laser light source 102 can be increased to ≥45 dB, while the signal-to-noise ratio of the detection beam emitted by the 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 beam, and further ensure the clarity of the target image and the high signal-to-noise ratio of the PPG waveform signal, effectively improving the reliability and accuracy of the detection device. At the same time, because the laser has high monochromaticity, high signal-to-noise ratio, and strong anti-interference ability, and the detection device is also provided with a filter 204 on the light incident side of the imaging unit 202, even if the detection device is not closely attached to the target area or does not form a sealed space with the target area, it can effectively prevent light beams other than the detection beam from entering the imaging unit 202. Therefore, the detection device can realize non-contact remote sensing health index detection, and thus can be competent for more application scenarios, with strong practicability.

[0059] It should be noted that ambient light is a continuous light beam, and the light intensity of any narrow wavelength range of ambient light is lower than that of ambient light. That is to say, even if the part of ambient light with the same wavelength as the detection beam enters the imaging unit 202, due to its low light intensity, that is, low optical intensity, its influence on the signal-to-noise ratio of the detection beam is small, and it can still ensure the high signal-to-noise ratio of the PPG waveform formed by the detection beam, and further ensure 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 of the laser (modulation bandwidth > 1 MHz), it can support fast signal acquisition, enabling the detection device to adapt to real-time monitoring in dynamic scenarios, and the delay can be controlled within 10 ms. Based on the multi-parameter expansion of the laser, such as light intensity, wavelength, etc., multiple health indexes (such as blood glucose trend, lactic acid level, etc.) can be detected simultaneously through laser spectroscopy analysis, providing possibilities for the intelligent development of first aid equipment.

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

[0062] Regarding the imaging unit 202, a target image can be obtained based on the reflected light beam, and the target image can be a blood flow distribution map at a preset depth of the target area. Specifically, based on the pixels in the imaging unit 202, the target area can include multiple imaging areas, and multiple imaging areas correspond one-to-one with at least some of the multiple pixels. Each pixel among the multiple pixels can collect the reflected light beam of its corresponding imaging area and generate an optical signal based on the collected reflected light beam. Moreover, the intensity of the optical signal generated by each pixel is positively correlated with the light intensity of the reflected light beam it collects, that is, the intensity of the optical signal generated by each pixel is proportional to the light intensity of the reflected light beam of its corresponding imaging area. Thus, a target image can be obtained based on the reflected light beam. It should be noted that the one-to-one correspondence between multiple imaging areas and at least some of the multiple pixels can be understood as follows: if the area of the target area is not less than the imaging range of the imaging unit 202, then multiple imaging areas in the target area correspond one-to-one with multiple pixels; if the area of the target area is less than the imaging range of the imaging unit 202, then multiple imaging areas in the target area correspond one-to-one with a part of the multiple pixels.

[0063] It is known that the intensity of the optical signal generated by a pixel is positively correlated with the light intensity of the reflected light beam it collects. That is to say, the above-mentioned pixel can be a photosensitive device similar to a photodiode. Namely, 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 beam is large, then the light intensity of the optical signal generated by the pixel is also large; conversely, the light intensity of the optical signal generated by the pixel is small. Thus, different intensities of optical signals can be generated according to the intensity of the collected reflected light beam, and then an image of the target area can be obtained based on the optical signals generated by the pixels, that is, the target image can be obtained. The target image can be a blood flow distribution map at a preset depth of the target area, representing the blood flow distribution information at the preset depth of the target area. The specific working process can be as follows: the imaging unit 202 responds to a control signal. At a certain moment, it collects the reflected light beams of each imaging area in the target area and generates optical signals based on the collected reflected light beams to obtain the target image of the target area, that is, to obtain the real-time blood flow distribution map of the target area or the blood flow distribution map at a specific moment, and then to know the real-time blood flow distribution information or the blood flow distribution information at a specific moment of the target area. This blood flow distribution information can be used for angiography, disease screening, etc.

[0064] In an embodiment of the present application, regarding the imaging unit 202 obtaining a detection signal based on the reflected light beam, the 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 collected reflected light beam within a preset time. That is, one or several pixels in the imaging unit 202 can continuously collect the reflected light beam in their corresponding imaging areas based on a control signal within a preset time, and generate corresponding optical signals based on the collected reflected light beam within a preset time, thereby obtaining the light intensity change data within a period of time, that is, the detection signal can be obtained. Based on the detection signal obtained by the above one or several pixels, the processing unit 206 can obtain the light intensity change curve of the optical signal corresponding to each pixel among the one or several pixels. Based on the obtained light intensity change curve, by counting the number of peaks in the curve, health indicators such as heart rate can be obtained.

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

[0066] It should be noted that the control signal for obtaining the target image and the control for obtaining the detection signal can come from the processing unit 206 or from an external control element. The present application does not limit this, and it depends on the specific situation.

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

[0068] In an embodiment of the present application, as Figure 2 shown, Figure 2 is a schematic structural diagram of a health indicator detection device provided by the present application. The filter 204 can include at least one sub-filter, and the at least one sub-filter corresponds one-to-one with the laser beam in the detection beam, and the transmission wavelength of each sub-filter in the at least one sub-filter corresponds to the wavelength of a laser beam in the detection beam. That is to say, the filter 204 includes sub-filters corresponding one-to-one with the laser beams in the detection beam, and each sub-filter only transmits one laser beam in the detection beam, so that the filter 204 can filter out the light beams other than the detection beam.

[0069] Among them, the bandwidth of the sub-filter is in the range of 10 nm to 20 nm, including the end values. That is to say, the passband range of the sub-filter can be relatively narrow, being a narrowband filter, so that the monochromaticity of the reflected light beam transmitted to the imaging unit 202 through the sub-filter is better, the signal-to-noise ratio is higher, and the accuracy of the obtained health indicators is ensured.

[0070] In an embodiment of the present application, as Figure 2 shown, the detection device may further include a first driving unit 300, and the first driving unit 300 is used to drive any one of at least one sub-filter to the light incident side of the imaging unit 202 to filter the reflected light beam, or the first driving unit 300 is used to drive some or all of at least one sub-filter to the light incident side of the imaging unit 202 in sequence. For example Figure 2 shown, the first driving unit 300 can drive the corresponding sub-filter to the light incident surface of the imaging unit 202 by rotating, but the present application does not limit this, and it depends on the specific situation.

[0071] Specifically, when a laser beam emitted by the laser light source 102 is a certain laser beam, the first driving unit 300 is used to drive the sub-filter corresponding to the laser beam in at least one sub-filter to the light incident side of the imaging unit 202; when the laser light source 102 emits at least two laser beams in the detection beam in sequence, the first driving unit 300 is used to drive the sub-filters corresponding to the at least two laser beams in at least one sub-filter to the light incident side of the imaging unit 202 in the emission order of the at least two laser beams; when the laser light source 102 emits all the laser beams in the detection beam in sequence, the first driving unit 300 is used to drive at least one sub-filter to the light incident side of the imaging unit 202 in the emission order of each laser beam in the detection beam, so as to realize the filtering of the reflected light beam formed based on the detection beam, and suppress the transmission of the light beam other than the detection beam to the imaging unit 202, affecting the detection result.

[0072] Moreover, based on the above, it can be known that the first driving unit 300 can drive the corresponding sub-filter to the light incident side of the imaging unit 202 based on the laser beam emitted by the laser light source 102. That is to say, there will be no situation where two or more laser beams are transmitted to the imaging unit 202 through the same filter 204. Thus, the imaging unit 202 only images or obtains detection signals based on one laser beam in the detection beam each time, and further, the mutual interference between different laser beams in the detection beam can be avoided, and the accuracy of the obtained health indicators can be improved.

[0073] In an embodiment of the present application, as Figure 3 shown, Figure 3The structural schematic diagram of an imaging health detection device provided by this application. The imaging unit 202 may include at least one sub-imaging unit corresponding one-to-one to the laser beams in the detection beam. It can also be understood that the detection part 200 may include multiple imaging units 202 corresponding one-to-one to the laser beams in the detection beam.

[0074] Since one sub-filter only corresponds to that laser beam in the detection beam, if the detection part 200 may include multiple imaging units 202 corresponding one-to-one to the laser beams in the detection beam, then at least one sub-filter corresponds one-to-one to at least one sub-imaging unit and is located on the incident light side of the corresponding sub-imaging unit to filter the reflected beam formed based on the detection beam, avoiding the transmission of beams other than the detection beam to the imaging unit 202 to ensure the accuracy of the obtained health indicators.

[0075] In an embodiment of this application, the detection beam further includes a second laser beam with a second wavelength and a third laser beam emitting a third wavelength. Among them, the value of the first wavelength can be 660 nm, the value of the second wavelength can be 520 nm, and the value of the third wavelength can be 940 nm, that is, the detection beam may include laser beams of red light (the first laser beam), green light (the second laser beam), and infrared (the third laser beam). However, this application does not limit this. The detection beam above may also include laser beams with other wavelengths, depending on the specific situation.

[0076] Based on the above first laser beam, second laser beam, and third laser beam, the transmission curve graph of the filter 204 can be as Figure 4 shown. It should be noted that Figure 4 is only a schematic diagram of the transmission curve, but in reality, the transmittance of different beams may be the same or different.

[0077] It should be noted that hemoglobin has a relatively high absorption rate for red light and green light. Thus, when red light or green light penetrates the skin and tissues, a part will be absorbed by hemoglobin in the blood, and the remaining will be reflected and received by the imaging unit 202 (such as a photodiode) and converted into an optical signal. When the heart beats, the blood flows in the blood vessels, resulting in a change in the local blood volume and the amount of hemoglobin, and then the amount of light absorbed by hemoglobin will change accordingly, and the light intensity of the reflected beam will also fluctuate. The intensity of the optical signal formed by the imaging unit 202 based on the reflected beam will also change accordingly. Based on the change in the light intensity of the optical signal within a period of time, a detection signal can be obtained. Based on this detection signal, the number of heartbeats per minute (i.e., heart rate) of the detection target can be calculated, etc.

[0078] Blood oxygen saturation (SpO2) is defined as the percentage of oxyhemoglobin (HbO2) in total hemoglobin (Hb + HbO2). Oxyhemoglobin (HbO2) has strong absorption of infrared light (850 nm - 940 nm) and weak absorption of red light (600 nm - 750 nm). Deoxyhemoglobin (Hb), on the contrary, has strong absorption of red light and weak absorption of infrared light. By combining the absorption differences of red light and infrared light, the proportion of oxyhemoglobin in the blood can be calculated, and thus 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 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 methods, specific calculation principles and processes used by this detection device to obtain the above heart rate and blood oxygen saturation, etc., can be the same as those used by the existing detection devices with LED light sources, and will not be elaborated here.

[0080] In an embodiment of the present application, the laser light source 102 is further configured to emit a fourth laser beam with a fourth wavelength, which 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 all different, that is, the wavelength of the fourth laser beam is different from the wavelength of the detection beam.

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

[0082] As Figure 5 shown, Figure 5Schematic structural diagram of an imaging health detection device provided by this application. The device body 100 further includes a light homogenizing unit 106 and a spatial light modulation unit 108. This detection device can realize a projection function based on the first laser beam, the second laser beam, and the fourth laser beam, as well as the light homogenizing unit 106, the spatial light modulation unit 108, and the lens unit 104, so as to project and display the health indicators and target images of the detected target, in order to apply to more application scenarios. In addition, this detection device can also realize projection functions other than projecting and displaying health indicators based on the first laser beam, the second laser beam, and the fourth laser beam, as well as the light homogenizing unit 106, the spatial light modulation unit 108, and the lens unit 104, such as projecting pictures or animations, etc. Among them, when this detection device realizes the projection function, the first laser beam, the second laser beam, and the fourth laser beam are transmitted through the light homogenizing unit 106, the spatial light modulation unit 108, and the lens unit 104 in sequence.

[0083] It should be noted that the light homogenizing unit 106 can be composed of an aspherical lens, a fly-eye lens, a light bar, and a diffractive optical element (Diffractive Optical Element, abbreviated as DOE). The spatial light modulation unit 108 can be a digital micromirror device (Digital Micromirror Device, abbreviated as DMD), liquid crystal, or liquid crystal on silicon (Liquid Crystal on Silicon, abbreviated as LCOS). The bandpass range of the lens unit 104 is 400nm~1100nm.

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

[0085] In an embodiment of this application, as Figure 6 shown, Figure 6 Schematic structural diagram of an imaging health detection device provided by this application. This detection device further includes a second driving unit 400, and the device body 100 is installed on the second driving unit 400. The second driving unit 400 can be used to drive the device body 100, so that by moving the device body, the detected target can be scanned, the imaging range of the device body 100 when detecting the detected target can be expanded, so as to expand the range of the target area in the detected target, so that the device body can even image the entire area of the detected target, and obtain detection signals based on the entire area of the detected target, so that this detection device can achieve the purpose similar to devices such as CT or nuclear magnetic resonance, and has strong application value.

[0086] In addition, in order to achieve 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. However, the specific type and model of the imaging unit 202 are not limited in this application and will depend on the specific situation.

[0087] In one embodiment of the present application, the detection part 200 further includes a data sending unit (not shown in the figure), such as Bluetooth, etc. The data sending unit is communicatively connected to the processing unit 206 and is used to output the health indicators of the detected target. For example, the health indicators of the detected target obtained can be sent to electronic devices such as a computer or a mobile phone through the data sending unit for storage or viewing, etc.

[0088] In summary, the present application provides an imaging health detection device, which includes: 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 incident side of the imaging unit. The transmission wavelength of the filter can include the wavelength of the detection light beam. Among them, the laser light source emits a detection light beam, the lens unit focuses the detection light beam on the target area of the detected target, so that the detection light beam can penetrate the target area to a preset depth and reflect at the preset depth of the target area to form a reflected light beam. The reflected light beam is transmitted to the imaging unit through the filter, and 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 area, and the detection signal can represent the change in the light intensity of the reflected light beam at the preset depth of the target area within a preset time. The processing unit obtains the health indicators of the detected target based on the detection signal. That is to say, this detection device can obtain both the detection image of the detected target and the health indicators of the detected target.

[0089] In addition, since the detection light beam is a laser beam, it has the characteristics of high directivity and energy concentration. Consequently, the scattering loss is low and the penetration ability is strong. At the same time, the laser beam also has high monochromaticity and a high signal-to-noise ratio, which can greatly improve the signal-to-noise ratio and penetration ability of the detection light beam. Furthermore, it can effectively reduce the requirements for each component in the detection device, reduce costs, relieve the computing pressure on the processing unit, shorten the detection time, improve the detection speed, and can obtain tissue information deeper inside to analyze more health indicator signals and obtain more health indicators. At the same time, the laser beam has high monochromaticity and a high signal-to-noise ratio, and the detection device also includes a filter disposed on the light incident side of the imaging unit, which can further improve the signal-to-noise ratio of the detection light beam. Furthermore, it can ensure the clarity of the target image and also ensure a high signal-to-noise ratio of the PPG waveform signal, improving the accuracy of the obtained health indicators.

[0090] In the present specification, the various embodiments are described in a progressive, or parallel, or a combination of progressive and parallel manners. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method section.

[0091] It should be noted that in the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to 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 may be intermediate components present at the same time.

[0092] It should also be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that an article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the article or device including the above elements.

[0093] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be obvious to those skilled in the art. 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 these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An imaging type health index detection device, characterized in that Comprising: Device body; The device body includes: A laser light source for emitting a detection beam, the detection beam including at least a first laser beam of a first wavelength; A lens unit that focuses the detection beam on a target area of a detection target, so that the detection beam transmits through the target area to a preset depth and reflects at the preset depth of the target area to form a reflected beam; A detection part including an imaging unit and a filter. The filter is located on the transmission path of the reflected beam and on the light incident side of the imaging unit. The transmission wavelength of the filter includes the wavelength of the detection beam. The reflected beam is transmitted to the imaging unit through the filter, and the imaging unit obtains a target image and a detection signal based on the reflected beam. The target image represents the blood flow distribution at the preset depth of the target area, and the detection signal represents the change in the light intensity of the reflected beam at the preset depth of the target area within a preset time; The detection part further includes a processing unit that obtains a health index of the detection target based on the detection signal.

2. The imaging-based health index detection device according to claim 1, wherein The imaging unit includes a plurality of pixels arranged in M rows and N columns, where M and N are integers greater than 1; The target area includes a plurality of imaging areas, and at least part of the plurality of imaging areas corresponds one-to-one with the plurality of pixels. Each pixel in the plurality of pixels collects the reflected beam of its corresponding imaging area and generates an optical signal based on the collected reflected beam. The intensity of the optical signal generated by the pixel is proportional to the light intensity of the reflected beam it collects, so as to obtain the target image.

3. The imaging health index detection device according to claim 2, wherein At least one of the plurality of pixels in the imaging unit responds to a control signal and generates an optical signal based on the reflected beam it collects within the preset time, so as to obtain the detection signal; The processing unit obtains a health index of the detection target based on the detection signal obtained by the at least one pixel.

4. The imaging-based health indicator detection device according to claim 3, characterized in that, The imaging unit is a CCD camera or a CMOS camera.

5. The imaging-based health index detection device according to claim 1, wherein The filter includes at least one sub-filter, and the at least one sub-filter corresponds one-to-one with the laser beams in the detection beam. The transmission wavelength of each sub-filter in the at least one sub-filter corresponds to the wavelength of one laser beam in the detection beam.

6. The imaging-based health indicator detection device according to claim 5, wherein, It further includes a first driving unit; The first driving unit drives any one of the at least one sub-filters to the light incident side of the imaging unit; or The first driving unit drives some or all of the at least one sub-filters to the light incident side of the imaging unit in sequence.

7. The imaging-based health index detection device according to claim 5, wherein The imaging unit includes at least one sub-imaging unit corresponding one-to-one with the laser beams in the detection beam; The at least one sub-filter corresponds one-to-one with the at least one sub-imaging unit and is located on the light incident side of the corresponding sub-imaging unit.

8. The imaging-based health index detection device according to any one of claims 5-7, characterized in that, The detection beam further includes a second laser beam of a second wavelength and a third laser beam of a third wavelength, and the first wavelength, the second wavelength, and the third wavelength are different; The filter includes three sub-filters, and the transmission wavelengths of the three sub-filters respectively include the first wavelength, the second wavelength, and the third wavelength.

9. The imaging-based health indicator detection device according to claim 8, wherein The value of the first wavelength is 660 nm, the value of the second wavelength is 520 nm, and the value of the third wavelength is 940 nm; The value range of the bandwidth of the sub-filter is 10 nm to 20 nm, including the end values.

10. The imaging type health index detection device according to claim 8, characterized in that, The device body further includes a light homogenizing unit and a spatial light modulation unit. The laser light source is further configured to emit a fourth laser beam with a fourth wavelength, and the fourth wavelength is different from the first wavelength, the second wavelength, and the third wavelength; The imaging type health index detection device realizes a first function based on the detection beam, the lens unit, and the detection part. The first function includes forming the target image and obtaining the health index of the detection target; wherein, the detection beam is sequentially transmitted through the light homogenizing unit and the spatial light modulation unit, and is transmitted to the target area by the lens unit; The imaging type health index detection device further realizes a second function based on the first laser beam, the second laser beam, and the fourth laser beam, as well as the light homogenizing unit, the spatial light modulation unit, and the lens unit. The second function includes a projection function to project and display the target image and the obtained health index of the detection target; wherein, the first laser beam, the second laser beam, and the fourth laser beam are sequentially transmitted through the light homogenizing unit, the spatial light modulation unit, and the lens unit.

11. The imaging-based health indicator detection device according to claim 10, wherein, The value of the fourth wavelength is 465 nm.

12. The imaging type health index detection device according to claim 1, wherein It further includes a second driving unit; The device body is installed 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.

13. The imaging-based health index detection device according to claim 1, wherein, The detection part further includes a data sending unit; The data sending unit is communicatively connected to the imaging unit and is configured to output the target image; The data sending unit is further communicatively connected to the processing unit and is configured to output the obtained health index of the detection target.

Images