CN112617746B - Non-contact physiological signal detection device - Google Patents
Non-contact physiological signal detection device Download PDFInfo
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- CN112617746B CN112617746B CN201910955653.8A CN201910955653A CN112617746B CN 112617746 B CN112617746 B CN 112617746B CN 201910955653 A CN201910955653 A CN 201910955653A CN 112617746 B CN112617746 B CN 112617746B
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- 238000012545 processing Methods 0.000 claims abstract description 54
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
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- 229910052760 oxygen Inorganic materials 0.000 claims description 5
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0033—Features or image-related aspects of imaging apparatus classified in A61B5/00, e.g. for MRI, optical tomography or impedance tomography apparatus; arrangements of imaging apparatus in a room
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
Abstract
The invention mainly provides a non-contact physiological signal detection device, the simplest structure of which only comprises a light sensing unit and a signal processing module; the light sensing unit is used for facing a sensing part of a tested object, and further collects diffuse light from the surface of the sensing part in a non-contact mode. The signal processing module at least comprises a signal receiving unit and a signal processing unit. After the physiological signal is received by the signal receiving unit, the signal processing unit performs at least one signal processing on the physiological signal, so as to obtain at least one physiological information. The non-contact physiological signal detection device does not contain any photographing unit, so that the physiological signal detection program can be completed under the conditions of protecting the privacy of a testee and not damaging the skin of the testee, and the non-contact physiological signal detection device has the advantages of simple structure and low cost.
Description
Technical Field
The invention belongs to the technical field of physiological signal detection, and particularly relates to a non-contact physiological signal detection device capable of completing a physiological signal detection program under the conditions of protecting privacy of a detected person and not damaging skin of the detected person.
Background
Physiological information such as blood oxygen concentration and heartbeat is an important index for judging the health state of a person. Currently, photoplethysmography (PPG) has been widely used to measure a physiological signal of an individual, and thus extract a physiological characteristic of the individual from the physiological signal. For example, taiwan patent No. I592138 discloses a wearable blood pressure measuring device adapted to be worn on the wrist of a subject for measurement of individual physiological signals. In the process of measuring the physiological signal of an individual, the wearable blood pressure measuring device emits a detection light to the wrist skin tissue, then receives the reflected light from the wrist skin tissue by using the light receiving unit, and continuously records the change of the reflected light to obtain a light volume change signal (PPG signal). On the other hand, U.S. patent publication No. US2017/0340217A1 discloses a physiological detection device, which is actually a fingertip pulse oximeter (Fingertip pulse oximeter). When measuring the physiological signal of an individual, the person to be measured must put his/her finger into a measurement space of the fingertip pulse oximeter, and then the fingertip pulse oximeter emits a detection light to a surface of the finger. Finally, after the transmitted light of the detection light is received and continuously recorded by the other surface of the finger, a light volume change signal can be obtained.
From the foregoing, it can be seen that photoplethysmography has been applied to light-reflective or light-transmissive contact physiological signal measurement devices. However, feedback comments from users indicate that contact physiological signal measuring devices can cause a number of inconveniences, such as skin allergy in users (e.g., infants) who are prone to sensitive skin. In view of this, another non-contact physiological signal measurement technique is proposed. For example, chinese patent No. CN102973253B discloses a system for monitoring human physiological pointers using visual information. In performing measurements of physiological signals, existing systems continuously capture images of a subject using a camera, then recognize the subject's face from the subject's images through complex calculations, and select a region of interest (Region of interest, ROI) over the subject's face position. Continuously, three-color channel separation processing is performed on the ROI image to obtain an R channel signal, a G channel signal, and a B channel signal. Finally, after processing and/or analyzing the three sets of channel signals of RGB using a specific algorithm, physiological characteristics or information of the individual can be obtained.
The foregoing is also known as imaging plethysmography (Imaging photoplethysmography, iPPG) or telemetry plethysmography (Remote photoplethysmography, rpg). Engineers familiar with the rpg technology must know that a non-contact physiological signal measurement device using the rpg technology must be equipped with a processing chipset having high-speed computing capability, so that the overall cost thereof cannot be effectively reduced. In addition, even if a processing chip set with high-speed computing capability is mounted, a non-contact physiological signal measuring device using the rpg technology still takes a lot of time to complete a huge amount of computation, and then individual physiological characteristics or information are extracted from an image of a subject obtained by photographing. More importantly, during the non-contact physiological signal measurement of the subject using the rpg, the face image of the subject is largely duplicated and stored, which causes the problem of lack of guarantee of privacy of the subject.
From the above description, the contact physiological signal measuring device based on PPG technology has the advantages of simple structure and low cost, but the feedback comments of the user indicate that the contact physiological signal measuring device is easy to cause skin allergy of the user with sensitive skin. On the other hand, although the non-contact physiological signal measuring device based on the rpg technology can complete the acquisition of the individual physiological signal without touching the user, the non-contact physiological signal measuring device must be equipped with a processing chipset with high-speed computing capability, which results in higher overall cost. Meanwhile, the non-contact physiological signal measurement device based on the rpg technology also raises concerns about the privacy of the subject.
In view of the above, the present inventors have studied and invented, and have finally developed a non-contact type physiological signal detection device capable of performing a physiological signal detection procedure while protecting the privacy of a subject and not damaging the skin of the subject, which has the advantages of simple structure and low cost.
Disclosure of Invention
The main objective of the present invention is to provide a non-contact physiological signal detection device, which has the advantages of simple structure and low cost of a contact physiological signal measurement device based on PPG technology, and simultaneously has the characteristics of non-contact physiological signal measurement of a non-contact physiological signal measurement device based on rpg technology. Furthermore, the non-contact physiological signal detection device of the invention does not comprise any photographing unit, so as to complete the physiological signal detection procedure under the conditions of protecting the privacy of the testee and not injuring the skin of the testee.
To achieve the above object, the present invention provides an embodiment of the non-contact physiological signal detecting device, which includes:
a light sensing unit for facing a sensing portion of a subject to collect a diffuse light from a surface of the sensing portion in a non-contact manner; and
a signal processing module, comprising:
a signal processing unit;
the control unit is coupled with the signal processing unit and the light sensing unit and is used for controlling the light sensing unit to collect the diffuse light; and
The signal receiving unit is coupled with the light sensing unit and the signal processing unit and is used for receiving the diffused light through the light sensing unit and transmitting a physiological signal corresponding to the diffused light to the signal processing unit;
after receiving the physiological signal, the signal processing unit performs at least one signal processing on the physiological signal to obtain at least one physiological information.
In an embodiment of the non-contact physiological signal detecting device according to the present invention, the physiological information may be any of the following: blood volume, heart rate, respiration rate, blood oxygen, blood pressure, vascular viscosity (Blood vessel viscosity), venous function, venous reflux, ankle pressure, genital response (Genital responses), cardiac output (cardioac output).
In a possible embodiment, the non-contact physiological signal detection device of the present invention further includes a data output unit coupled to the signal processing unit, so that the signal processing unit outputs at least one physiological information through the data output unit. Wherein, the data output unit can be any one of the following: a display, a loudspeaker, a wired transmission interface and a wireless transmission interface.
In one possible embodiment, the non-contact physiological signal detecting device of the present invention further includes a condensing lens interposed between the light sensing unit and the diffuse light for focusing the diffuse light to the light sensing unit. Wherein the diffuse light is a single wavelength light or a multi-wavelength light.
In an embodiment of the non-contact physiological signal detecting device of the present invention, the diffuse light is generated on the surface of the sensing portion when the subject is exposed to an ambient light. The ambient light is natural light or artificial light provided by an external light source.
In one possible embodiment, the non-contact physiological signal detection device of the present invention further includes a light emitting unit for emitting a detection light to the surface of the sensing portion of the subject, so that the diffuse light is generated on the surface of the sensing portion. The light emitting unit comprises at least one light emitting component, and the light emitting component can be any one of the following components: light emitting diodes, vertical cavity light emitting diodes, organic light emitting diodes.
In an embodiment of the non-contact physiological signal detection device of the present invention, the signal processing module further includes a driving unit coupled to the control unit for driving the light emitting unit to emit the detection light.
In an embodiment of the non-contact physiological signal detecting device of the present invention, the light sensing unit may be any one of the following: single point light sensor (Single point photo sensor), matrix light sensor (Matrix photo sensor), single channel image sensor (One-channel image sensor), multi-channel image sensor (multi-channel image sensor).
In an embodiment of the non-contact physiological signal detection device of the present invention, the light sensing unit includes an infrared light sensor, so that the non-contact physiological signal detection device of the present invention has an integrated temperature measurement function.
In one possible embodiment, the light sensing unit includes an infrared light sensor, so that the non-contact physiological signal detecting device of the present invention can be integrated into an optical body temperature measurer.
In one possible embodiment, the non-contact physiological signal detection device of the present invention further includes a sensing region marking unit, coupled to the control unit, for transmitting a marking signal to the surface of the sensing portion based on the control of the control unit, so as to mark a sensing region on the surface of the sensing portion. Wherein the marking signal may be any of the following: light spots, patterns, symbols, words.
In one possible embodiment, the signal processing module further includes a living body detection unit, coupled to the signal processing unit and/or the signal receiving unit, for performing a signal analysis on the physiological signal, so as to determine whether the physiological signal contains at least one living body physiological characteristic, so as to determine whether the test object is a living body or a non-living body.
In an embodiment of the non-contact physiological signal detection device according to the present invention, the living body physiological characteristic includes: at least one frequency domain physiological characteristic and/or at least one time domain physiological characteristic. Wherein the frequency domain physiological characteristic is a periodic pulsation of a heartbeat, and the time domain physiological characteristic is at least one living body waveform characteristic carried by the physiological signal.
In one possible embodiment, the non-contact physiological signal detection device of the present invention further includes a warning unit coupled to the living body detection unit; wherein, when the living body detection unit judges that the tested object is the non-living body, the warning unit sends out a warning message.
Drawings
FIG. 1 is a first schematic perspective view of a first embodiment of a non-contact physiological signal detecting device according to the present invention;
FIG. 2 is a functional block diagram of a non-contact physiological signal detecting device according to a first embodiment of the present invention;
FIG. 3 is a second schematic perspective view of the first embodiment of the non-contact physiological signal detecting device according to the present invention;
FIG. 4 is a schematic perspective view of a second embodiment of a non-contact physiological signal detecting device according to the present invention;
FIG. 5 is a functional block diagram of a non-contact physiological signal detecting device according to a second embodiment of the present invention;
FIG. 6 is a functional block diagram of a third embodiment of a non-contact physiological signal detecting device according to the present invention;
FIG. 7 is a functional block diagram of a non-contact physiological signal detecting device according to a fourth embodiment of the present invention; and
FIG. 8 is a functional block diagram of a non-contact physiological signal detecting device according to a fifth embodiment of the present invention.
[ symbolic description ]
< invention >
1. Non-contact physiological signal detection device
10. Data output unit
11. Photo sensing unit
12. Signal processing module
120. Signal processing unit
121. Control unit
122. Signal receiving unit
123. Driving unit
124. Living body detection unit
13. Light-emitting unit
14. Condensing lens
15. Sensing region marking unit
16. Warning unit
2. Test article
21. Sensing part
M sensing region
< Prior Art >
Without any means for
Detailed Description
In order to more clearly describe the non-contact physiological signal detecting device according to the present invention, the following describes the preferred embodiments of the present invention with reference to the accompanying drawings.
First embodiment
Fig. 1 shows a first schematic perspective view of a first embodiment of a non-contact physiological signal detecting device according to the present invention, and fig. 2 shows a functional block diagram of the first embodiment of the non-contact physiological signal detecting device according to the present invention. In particular, in the first embodiment, the present invention is to implement the non-contact physiological signal detecting device 1 in the simplest architecture. As shown in fig. 1 and 2, the present invention only comprises a light sensing unit 11 and a signal processing module 12 to form a first embodiment of a non-contact physiological signal detecting device 1. The light sensing unit 11 is configured to face a sensing portion 21 of a subject 2, and further collect a diffuse light from a surface of the sensing portion 21 in a non-contact manner. For example, fig. 1 shows the subject 2 as a human body, and the sensing region 21 as the skin of the face, hand, or other exposed portion of the human body.
In the case where the subject 2 is exposed to an ambient light, the diffuse light is generated at the surface of the sensing portion 21. It is noted that the ambient light may be a natural light or an artificial light provided by an external light source, and thus the diffuse light may be a single wavelength light or a multi-wavelength light. For the above reasons, the present invention is not limited to the type of the light sensing unit 11. The light sensing unit 11 of the non-contact type physiological signal detecting device 1 can be a single-point light sensor (Single point photo sensor), a matrix light sensor (Matrix photo sensor), a single-channel image sensor (One-channel image sensor) or a multi-channel image sensor (multi-channel image sensor) according to the type of the light source of the ambient light.
To illustrate in more detail, the signal processing module 12 includes: a signal processing unit 120, a control unit 121, and a signal receiving unit 122. The control unit 121 is coupled to the signal processing unit 120 and the light sensing unit 11, and is configured to control the light sensing unit 11 to collect the diffuse light. On the other hand, the signal receiving unit 122 is coupled to the light sensing unit 11 and the signal processing unit 120, and is configured to receive the diffuse light through the light sensing unit 11 and transmit a physiological signal corresponding to the diffuse light to the signal processing unit 120. Further, after receiving the physiological signal, the signal processing unit 120 performs at least one signal processing on the physiological signal, so as to obtain at least one physiological information. Depending on the execution content and algorithm of the signal processing, the finally obtained physiological information is different. In general, the physiological information may be Blood volume (Blood volume variation), heart Rate (HR), respiratory Rate (RR), blood oxygen (Blood oxygen level), blood pressure (Blood pressure), vascular viscosity (Blood vessel viscosity), venous function (Venous function), venous reflux (Venous reflex), ankle pressure (Ankle pressure), genital response (Genital responses), cardiac output (cardiooutput).
Fig. 2 also shows that the signal processing unit 120 is coupled to a data output unit 10. After the processing of the physiological signal is completed and at least one physiological information is obtained, the signal processing unit 120 outputs the at least one physiological information through the data output unit 10. The present invention is not limited to the type of the data output unit 10, and may be a display device, a speaker, a wired transmission interface, or a wireless transmission interface. Referring further to fig. 3, a second schematic perspective view of the first embodiment of the non-contact physiological signal detecting device according to the present invention is shown. As shown in fig. 3, a condensing lens 14 is disposed between the light sensing unit 11 and the diffuse light, so that the diffuse light is effectively focused to the light sensing unit 11.
After careful examination of fig. 1 and 3, it can be seen that fig. 1 and 3 show the non-contact physiological signal detecting device 1 according to the present invention in the form of a frontal thermometer (Forehead thermometer). In practical application of the present invention, the non-contact physiological signal detecting device 1 can have an integrated temperature measuring function as long as the light sensing unit 11 includes an infrared light (line) sensor. Therefore, it is easy to understand that the non-contact physiological signal detecting device 1 of the present invention can be integrated in an optical body temperature measuring device, for example: frontal thermometer or Ear thermometer (Ear thermometer). Alternatively, the noncontact physiological signal detecting device 1 according to the present invention may be a group of optical body temperature measuring devices having a physiological signal detecting function.
Second embodiment
Fig. 4 shows a schematic perspective view of a second embodiment of the non-contact physiological signal detecting device according to the present invention, and fig. 5 shows a functional block diagram of the second embodiment of the non-contact physiological signal detecting device according to the present invention. As can be easily seen by comparing fig. 2 and fig. 5, the second embodiment of the non-contact physiological signal detecting device 1 according to the present invention further includes a light emitting unit 13. Also, in the second embodiment, a driving unit 123 is further integrated into the signal processing module 12. As shown in fig. 5, the driving unit 123 is coupled to the control unit 121 and the light emitting unit 13, and is used for driving the light emitting unit 13 to emit an artificial light as the detection light. It should be appreciated that the artificial light may be single wavelength light or multiple wavelength light. More specifically, the light emitting unit 13 includes at least one light emitting component, and the light emitting component may be a light emitting diode, a vertical cavity light emitting diode, or an organic light emitting diode. The Light-emitting diode (LED) may be a monochromatic LED or a polychromatic LED including at least green Light (400-600 nm), red Light (600-800 nm) and infrared Light (800-1000 nm), and the Organic Light-emitting diode (OLED) may be a monochromatic OLED or a polychromatic OLED including at least green Light, red Light and infrared Light.
Briefly, the first embodiment of the non-contact physiological signal detection device described above is to perform physiological signal measurement of the subject 2 under the condition of no light source or natural light source. In contrast, in the second embodiment, the non-contact physiological signal detecting device 1 can automatically emit the detection light to the sensing portion 21 of the subject 2 by the light emitting unit 13 thereof, and then complete the physiological signal measurement of the sensing portion 21.
Third embodiment
FIG. 6 is a functional block diagram of a third embodiment of a non-contact physiological signal detecting device according to the present invention. As can be easily seen by comparing fig. 5 and fig. 6, the third embodiment of the non-contact physiological signal detecting device 1 according to the present invention further includes a sensing region marking unit 15 coupled to the control unit 121 and configured to emit a marking signal to the surface of the sensing portion 21 based on the control of the control unit 121, so as to mark a sensing region M on the surface of the sensing portion 21. For example, spots, patterns, symbols, or characters are marked on the surface of the sensing portion 21. It should be noted that the addition of the sensing area marking unit 15 helps to improve the measurement accuracy of the non-contact physiological signal detecting device 1. For example, it is difficult for an operator to determine whether the light sensing unit 11 is facing the sensing portion 21 of the subject 2 without using the light emitting unit 13 or the detection light is an infrared light (infra red light). In particular, if the sensing portion 21 is the forehead of the subject 2, there is a high probability that the operator will face the light sensing unit 11 to the forehead of the subject 2 covered by the hair. In this case, the physiological signal carried by the diffuse light collected by the light sensing unit 11 cannot completely reflect the real physiological condition of the subject 2. Conversely, after marking the sensing region M on the surface of the sensing site 21 of the test object 2 by the sensing region marking unit 15, the operator can align the light sensing unit 11 with the correct sensing site 21 of the test object 2. Thus, the physiological signal carried by the diffuse light collected by the light sensing unit 11 can be ensured to reflect the real physiological condition of the subject 2, so as to improve the measurement accuracy of the non-contact physiological signal detection device 1.
Fourth embodiment
Fig. 7 is a functional block diagram of a non-contact physiological signal detecting device according to a fourth embodiment of the present invention. As can be easily seen by comparing fig. 2 and fig. 7, the fourth embodiment of the non-contact physiological signal detecting device is obtained by adding a sensing area marking unit 15 to the architecture of the first embodiment. In the fourth embodiment, the operator can use the sensing area marking unit 15 to mark the sensing area M on the surface of the sensing portion 21 of the object 2 and then align the light sensing unit 11 with the correct sensing portion 21 of the object 2. Thus, the physiological signal carried by the diffuse light collected by the light sensing unit 11 can be ensured to reflect the real physiological condition of the subject 2, so as to improve the measurement accuracy of the non-contact physiological signal detection device 1.
Fifth embodiment
FIG. 8 is a functional block diagram of a non-contact physiological signal detecting device according to a fifth embodiment of the present invention. As can be seen from comparing fig. 6 and fig. 8, the fifth embodiment of the non-contact physiological signal detecting device 1 according to the present invention further includes a living body detecting unit 124 coupled to the signal processing unit 120 and the signal receiving unit 122, and configured to perform a signal analysis on the physiological signal to determine whether the physiological signal contains at least one physiological characteristic of a living body, thereby determining whether the subject 2 is a living body or a non-living body. It should be noted that, in a practical embodiment, the in-vivo detection unit 124 may also be selectively connected to only the signal processing unit 120 or the signal receiving unit 122. In addition, the fifth embodiment further includes an alarm unit 16 coupled to the living body detection unit 124.
In more detail, the in-vivo detection unit 124 receives a physiological signal corresponding to the diffuse light through the signal receiving unit 122, and the physiological signal is a light volume change signal (PPG signal). After the physiological signal is subjected to a time domain signal processing, such as singular spectrum analysis (Singular Spectrum Analysis, SSA) or normalized least mean square (Normalized Least Mean Square, NLMS), time domain physiological features may then be extracted from the physiological signal for which the time domain signal processing is complete. Many studies report and/or literature have indicated that a physiological signal of a living body (e.g., a human body) has a particular time domain physiological characteristic, and thus the living body detection unit 124 can determine whether the subject 2 is a living body or a non-living body after confirming whether the physiological signal contains at least one physiological characteristic of the living body.
On the other hand, the living body detection unit 124 may also perform, for example, a fast fourier transform (Fast Fourier Transform, FFT) or a Short-time-interval fourier transform (Short-Time Fourier Transform, STFT) frequency domain signal processing on the physiological signal corresponding to the diffuse light (i.e., the light volume change signal (PPG signal)) after receiving the physiological signal through the signal receiving unit 122, and then extract frequency domain physiological features from the physiological signal subjected to the frequency domain signal processing, for example: periodic pulsations of the heartbeat.
The use of the living body detecting unit 124 also helps to improve and correct the measurement accuracy of the non-contact physiological signal detecting device 1 of the present invention. More specifically, if the operator is facing a non-living object using the light sensing unit 11 of the non-contact physiological signal detecting device 1 according to the present invention, the living object detecting unit 124 immediately determines that the object is not a living object. In this case, the in-vivo detection unit 124 notifies the alarm unit 16 of an alarm message to notify the operator, for example: light message, sound message, text message, image message, etc., or transmits the warning message through the data output unit 10.
Thus, the foregoing has fully and clearly described all the embodiments of the non-contact physiological signal detecting device and the features thereof according to the present invention. It should be emphasized that the foregoing disclosure of the preferred embodiments of the present invention is illustrative of all changes and modifications that may be made in accordance with the principles of the invention.
Claims (18)
1. A non-contact physiological signal detection device, comprising:
a light sensing unit for facing a sensing portion of a subject to collect a diffuse light from a surface of the sensing portion in a non-contact manner;
a signal processing module, comprising:
a signal processing unit;
the control unit is coupled with the signal processing unit and the light sensing unit and is used for controlling the light sensing unit to collect the diffuse light;
the signal receiving unit is coupled with the light sensing unit and the signal processing unit and is used for receiving the diffused light through the light sensing unit and transmitting a physiological signal corresponding to the diffused light to the signal processing unit; wherein the physiological signal is an optical volume change signal; and
The living body detection unit is coupled with the signal processing unit and the signal receiving unit and is used for performing signal analysis on the physiological signal so as to confirm whether the physiological signal contains at least one living body physiological characteristic; and
a sensing area marking unit coupled to the control unit and transmitting a marking signal to the surface of the sensing part under the control of the control unit, so as to mark a sensing area M on the surface of the sensing part, thereby ensuring that the optical sensing unit is aligned to the correct sensing part of the tested object;
wherein the marker signal may be any of the following: light spots, patterns, symbols, or text;
after receiving the physiological signal, the signal processing unit performs at least one signal processing on the physiological signal to obtain at least one physiological information.
2. The non-contact physiological signal detecting apparatus according to claim 1, wherein said physiological information is any one of: blood volume, heart rate, respiration rate, blood oxygen, blood pressure, vascular viscosity, venous function, venous return, ankle pressure, genital response, cardiac output.
3. The device of claim 1, further comprising a data output unit coupled to the signal processing unit such that the signal processing unit outputs at least one physiological information via the data output unit.
4. A non-contact physiological signal detecting device according to claim 3, wherein said data output unit is any one of: display device, speaker, wired transmission interface, wireless transmission interface.
5. The device of claim 1, further comprising a condensing lens between the light sensing unit and the diffuse light for focusing the diffuse light to the light sensing unit.
6. The device of claim 1, wherein the diffuse light is generated on the surface of the sensing portion when the subject is exposed to an ambient light.
7. The device of claim 6, wherein the ambient light is natural light or artificial light provided by an external light source.
8. The device of claim 1, further comprising a light emitting unit for emitting a detection light to the surface of the sensing portion of the subject such that the diffuse light is generated on the surface of the sensing portion.
9. The device of claim 8, wherein the light emitting unit comprises at least one light emitting element, and the light emitting element is: a light emitting diode.
10. The non-contact physiological signal detecting device according to claim 9, wherein said light emitting diode is a vertical cavity light emitting diode or an organic light emitting diode.
11. The device of claim 9, wherein the signal processing module further comprises a driving unit coupled to the control unit for driving the light emitting unit to emit the detection light.
12. The non-contact physiological signal detecting device according to claim 1, wherein said diffuse light is a single wavelength light or a multi-wavelength light.
13. The device of claim 1, wherein the light sensing unit is any one of the following: single-point light sensor, matrix light sensor, single-channel image sensor, multi-channel image sensor.
14. The device of claim 1, wherein the light sensing unit comprises an infrared light sensor, such that the device has an integrated temperature measurement function.
15. The device of claim 14, wherein the device is integrated into an optical thermometer.
16. The non-contact physiological signal detection apparatus according to claim 1, wherein said living organism physiological characteristic includes: at least one frequency domain physiological characteristic and/or at least one time domain physiological characteristic.
17. The non-contact physiological signal detecting device according to claim 1, further comprising:
a warning unit coupled to the living body detection unit; wherein, under the condition that the living body detection unit judges that the tested object is non-living body, the warning unit sends out warning information.
18. The non-contact physiological signal detection device according to claim 16, wherein the frequency domain physiological characteristic is a periodic pulsation of a heartbeat and the time domain physiological characteristic is at least one living body waveform characteristic carried by the physiological signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910955653.8A CN112617746B (en) | 2019-10-09 | 2019-10-09 | Non-contact physiological signal detection device |
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