CN211749545U - Fat thickness measuring device and mobile network terminal device comprising same - Google Patents
Fat thickness measuring device and mobile network terminal device comprising same Download PDFInfo
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- CN211749545U CN211749545U CN201922019307.7U CN201922019307U CN211749545U CN 211749545 U CN211749545 U CN 211749545U CN 201922019307 U CN201922019307 U CN 201922019307U CN 211749545 U CN211749545 U CN 211749545U
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Abstract
The utility model provides a fat thickness measuring device and a mobile network terminal device comprising the same, wherein the measuring device comprises a functional module, a first perovskite light-emitting diode, a second perovskite light-emitting diode, a photoelectric detector, a controller, a display and a circuit; the controller is electrically connected with each perovskite light emitting diode, the controller is electrically connected with the photoelectric detector, the controller outputs a measurement calculation result to the display, the peak light emitting wavelength of the first perovskite light emitting diode and the peak light emitting wavelength of the second perovskite light emitting diode are 750-800 nm, and the peak light emitting wavelength of the first perovskite light emitting diode is different from that of the second perovskite light emitting diode.
Description
Technical Field
The utility model relates to a human information measurement technical field particularly, relates to a flexible fat thickness measurement device and contain its mobile network terminating set.
Background
The fat content of the human body is an important measure of health, wherein subcutaneous fat is the major component of human fat, about 2/3 of human fat is stored in subcutaneous tissue, and its thickness can be used to predict the percentage of human fat. A portable instrument capable of accurately measuring the thickness of human body fat is valuable, infrared light has good penetrating property to an epidermal layer and a dermal layer of skin, muscle tissues have strong absorption capacity and forward scattering capacity to the infrared light, the absorption coefficient of fat to the infrared light is small, and the instrument has strong back scattering, the back scattering and the fat thickness are in a linear relation, the thickness of the human body fat is measured by detecting the back scattering light, and therefore the infrared noninvasive detection of the thickness of the human body subcutaneous fat can be realized by estimating the fat content of the human body. However, the existing infrared noninvasive detection device has the problem of large error.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a fat thickness measuring device and a mobile network terminal device including the same, so as to solve the problem of large fat thickness measurement error in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a fat thickness measuring device, comprising functional modules, the functional modules including a first perovskite light emitting diode, a second perovskite light emitting diode, a photodetector, a controller, a display, and a circuit; wherein the controller is electrically connected to each of the perovskite light emitting diodes, the controller is electrically connected to the photodetector, the controller outputs a measurement calculation result to the display, the peak emission wavelengths of the first perovskite light emitting diode and the second perovskite light emitting diode are 750nm to 800nm, and the peak emission wavelengths of the first perovskite light emitting diode and the second perovskite light emitting diode are different.
Further, the first perovskite light emitting diode has an emission wavelength of 760nm, and the second perovskite light emitting diode has an emission wavelength of 800 nm.
Further, the distance between the first perovskite light emitting diode and the photodetector and the distance between the second perovskite light emitting diode and the photodetector are between 3.5mm and 5mm, and the photodetector is a perovskite single crystal photodetector.
Further, the structure of the photodetector includes a perovskite single crystal layer, and a first electrode and a second electrode provided on one surface of the perovskite single crystal layer, wherein the first electrode and the second electrode have a space therebetween.
Further, the first perovskite light emitting diode, the second perovskite light emitting diode and the photodetector are all flexible devices.
Further, the first perovskite light emitting diode or the second perovskite light emitting diode has a structure including a first electrode layer, an electron transport layer, an interface modification layer, a perovskite light emitting layer, a hole transport layer, an interface buffer layer and a second electrode layer, which are sequentially stacked.
Furthermore, the electron transport layer is a zinc oxide nanocrystal layer, the interface modification layer is a polyethoxyethyleneimine layer, the hole transport layer is a poly [ (9, 9-dioctylfluorene-2, 7-diyl) -co- (4, 4' - (N- (4-sec-butylphenyl) diphenylamine) ] layer, and the interface buffer layer is a molybdenum oxide layer.
Further, the thickness of the perovskite light-emitting layer is 20 to 30nm, the thickness of the zinc oxide nanocrystal layer and the polyethoxyethyleneimine layer is 30nm, the thickness of the poly [ (9, 9-dioctylfluorene-2, 7-diyl) -co- (4, 4' - (N- (4-sec-butylphenyl) diphenylamine) ] layer is 60nm, the thickness of the molybdenum oxide layer is 7nm, and the thickness of the second electrode layer is 60 nm.
Further, the measuring device further includes a connection belt, the functional module is disposed in a housing, the connection belt is connected to the housing, the housing has a light-transmitting portion, and each of the perovskite light-emitting diodes is disposed in correspondence with the light-transmitting portion.
Further, above-mentioned measuring device still includes heart rate measurement module, and above-mentioned heart rate measurement module and above-mentioned functional module set up in a casing.
Further, above-mentioned measuring device still includes the time module, and above-mentioned time module, above-mentioned heart rate measurement module and above-mentioned functional module set up in a casing.
Further, the measuring device further comprises a network transmission module, and the network transmission module is used for transmitting the measurement calculation result to another network terminal.
According to another aspect of the present invention, there is provided a mobile network terminal device comprising the measuring device of any one of the above.
Use the technical scheme of the utility model, a fat thickness measurement device is provided, first and second perovskite emitting diode has, the perovskite emitting diode is luminous adjustable at 750 ~ 800nm within range, satisfy the special requirement to the wave band among the fat thickness measurement easily, and light colour purity is high, can be in order to reduce miscellaneous light, reduce the absorption of fat to miscellaneous light, and the perovskite emitting diode performance is better, the measurement deviation of fat thickness measurement device has been reduced better. In addition, the perovskite light emitting diode can be prepared by a solution method or a combination of the solution method and an evaporation method, so that the manufacturing cost is lower, and the cost of a measuring device can be reduced.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention. In the drawings:
fig. 1 shows a schematic diagram of a measurement apparatus according to an embodiment of the present invention.
Wherein the figures include the following reference numerals:
1. a first perovskite light emitting diode; 2. a second perovskite light emitting diode; 3. a photodetector.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances for purposes of describing the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The utility model provides a fat thickness measuring device, which comprises a functional module, a first perovskite light-emitting diode, a second perovskite light-emitting diode, a photoelectric detector, a controller, a display and a circuit; the controller is electrically connected with each perovskite light emitting diode, the controller is electrically connected with the photoelectric detector, the controller outputs a measurement calculation result to the display, the peak light emitting wavelength of the first perovskite light emitting diode and the peak light emitting wavelength of the second perovskite light emitting diode are 750 nm-800 nm, and the peak light emitting wavelength of the first perovskite light emitting diode is different from that of the second perovskite light emitting diode.
The first perovskite light emitting diode and the second perovskite light emitting diode are used for emitting light with two wavelengths, and are used for simultaneous equations to eliminate incoherent variables, so that the equations are functions of the variation of absorbed light and the thickness of fat. If there is only one wavelength of light, the inclusion of incoherent variables in the calculation function cannot be cancelled out.
The controller controls the two light-emitting diodes to emit light through the electric signal, two parts of light of the two light-emitting diodes are backscattered by the fat layer after entering subcutaneous fat of a human body, the scattered light signal is converted into the electric signal through the photoelectric detector, the electric signal is transmitted to the controller to be calculated and analyzed, and the thickness of the subcutaneous fat can be calculated through the difference value of two bundles of scattered light tested by the photoelectric detector according to the linear relation between the backscatter and the thickness of the fat. The results of the analysis are finally presented on a display.
The inventors have found that the absorption coefficient of human fat for the wavelength bands less than 600nm and greater than 900nm is large, and thus light backscattered to the skin surface layer is greatly reduced, and the error is increased by the reduction of the received signal of the photodetector. And the utility model discloses select two wave bands in 750 ~ 800nm, and human fat absorbs lessly in this scope to can improve fat measuring device's the degree of accuracy. Light with wave bands of 750-800 nm can penetrate through epidermis and dermis to enter the fat layer, the perovskite light emitting diode can emit light within the range of 750-800 nm and can be adjusted, special requirements on the wave bands in fat thickness measurement are easily met, light color purity is high, stray light can be reduced, absorption of fat to the stray light is reduced, the perovskite light emitting diode is good in performance, and measurement deviation of the fat thickness measuring device is better reduced. In addition, the perovskite light emitting diode can be prepared by a solution method or a combination of the solution method and an evaporation method, so that the manufacturing cost is lower, and the cost of a measuring device can be reduced.
In some embodiments, the first perovskite light emitting diode has a peak emission wavelength of 760nm and the second perovskite light emitting diode has a peak emission wavelength of 800 nm. The data accuracy can be increased by increasing the difference in absorption between the two beams, and the absorption of light by fat at 760nm and 800nm is at the peak and trough positions of this band, respectively.
In some embodiments, the distance between the first perovskite light emitting diode and the photodetector and the distance between the second perovskite light emitting diode and the photodetector are both between 3.5mm and 5mm, and the sensitivity of the detector for measuring thicker fat is reduced when the distance is less than the range, and the sensitivity of the detector for measuring thinner fat is reduced when the distance is more than the range, and the detection accuracy of thicker fat is better when the distance of the light source from the detector is farther within the range. The photodetector is a perovskite single crystal photodetector. The perovskite single crystal photoelectric detector has the advantages of long carrier service life, high carrier mobility, low defect state density, improved light responsivity, more excellent response speed and detection rate, higher energy conversion efficiency and reduced power consumption. The perovskite light emitting diode is spaced from the photodetector within the aforementioned range to improve the sensitivity of the photodetector to collect scattered light. In some preferred embodiments, two perovskite light emitting diodes are placed on either side of the photodetector at equal distances from the photodetector, such that the photodetector has similar or equivalent detection sensitivity to scattered light from the two perovskite light emitting diodes. It should be noted that the distance between two elements is equal to the distance between the geometric centers of the elements.
In some embodiments, the structure of the photodetector includes a perovskite single crystal layer, and a first electrode and a second electrode provided on one side surface of the perovskite single crystal layer with a space therebetween. In some preferred embodiments, the perovskite single crystal layer and the first electrode and the second electrode have a metal layer therebetween, and the metal layer is used for increasing the adhesion of the first and second electrodes.
In some embodiments, the first perovskite light emitting diode, the second perovskite light emitting diode, and the photodetector are all flexible devices. Therefore, the measuring device can be better attached to the skin, and the measuring error is reduced.
In some embodiments, the first perovskite light emitting diode or the second perovskite light emitting diode has a structure including a first electrode layer, an electron transport layer, an interface modification layer, a perovskite light emitting layer, a hole transport layer, an interface buffer layer, and a second electrode layer, which are sequentially stacked.
In some embodiments, the electron transport layer is a zinc oxide nanocrystal layer, the interface modification layer is a polyethoxyethyleneimine layer, the hole transport layer is a TFB layer, and the interface buffer layer is a molybdenum oxide layer. The structure enables the perovskite light emitting diode to have higher luminous efficiency.
In some embodiments, the controller is an STM32 single chip microcomputer.
In some embodiments, the measurement device further comprises a connection belt, the functional module is disposed within the housing, and the connection belt is connected to the housing. Therefore, the measuring device is convenient to carry and use and can be popularized to common families. The shell at least comprises a light-transmitting part, and the light-transmitting part corresponds to the first perovskite light-emitting diode and the second perovskite light-emitting diode, so that light of the light-emitting diodes can be emitted to the skin of a human body to be detected.
In some embodiments, the side of the test device not facing the skin is opaque so that the photodetector is not disturbed by ambient light, all of the light received being backscattered from the adipose layer back to the skin.
In some embodiments, the connecting band is one of a plastic band, a metal band, and a rubber band. In other embodiments, the connector strips include a plurality of apertures and a protrusion to effect the connection between the connector strips.
In some embodiments, the measurement device further comprises a heart rate measurement module, the heart rate measurement module and the functional module being disposed within one housing. The module is added, so that multifunctional measurement can be realized, and the attraction of the product to consumers is improved.
In some embodiments, the measurement device further comprises a time module, the heart rate measurement module and the functional module being disposed within one housing. The time module derives the current correct time so that the time can be displayed on the display.
In some embodiments, the measurement apparatus further comprises a network transmission module for transmitting the measurement calculation result to another network terminal. The other network terminal can be computer equipment of a doctor, and the doctor can conveniently master the health information of the tested person.
According to another aspect of the present invention, there is provided a mobile network terminal device, comprising the measuring device of any one of the above. The mobile network terminal device can be a mobile phone, a PAD, a notebook computer and the like.
In some embodiments, the testing device is disposed inside the mobile network terminal device, and the mobile network terminal device has a light outlet for passing light emitted by the light emitting diode of the testing device.
Example (b):
when the light source and the detector are close to each other, the thinner the fat is, the higher the measurement sensitivity is, and the thicker the fat is, the lower the sensitivity is. When the light source and the detector are far away, the conclusion is reversed. Therefore, the distance between the light source and the detector should not be too far or too close, and the measurement sensitivity for thinner and thicker fat should be satisfied. The distances between the perovskite light emitting diode with the wavelength of 760nm and the perovskite single crystal photodetector with the wavelength of 800nm adopted in the embodiment are both 5mm, and the distances are respectively positioned at two ends of the photoelectric sensor.
The first perovskite light emitting diode and the second perovskite light emitting diode are structurally composed of a substrate, an ITO electrode (the thickness of the film is 100nm), a zinc oxide nanocrystal and polyethoxyethyleneimine (the total thickness of the film is 30nm), a perovskite (the thickness of the film is 25nm), a TFB (the thickness of the film is 60nm), a molybdenum oxide (the thickness of the film is 7nm) and a gold electrode (the thickness of the film is 60 nm). The two light emitting diodes were otherwise identical except for the perovskite material. The material of the first perovskite light emitting diode is NMAI (C)11H12NI)：FABr(NH2CH＝NH2Br)：PbI2The material of the second perovskite light emitting diode is 5AVA (NH)2C4H8COOH):FAI(NH2CH＝NH2I):PbI2＝0.7:2.4:1。
The photodetector comprises a substrate, a perovskite single crystal layer (CH)3NH3PbBr320X 25X 2mm), a metallic chrome layer (film thickness 10nm), and two gold electrode layers (film thickness 300nm) spaced apart.
The controller is an STM32 single chip microcomputer, the general I/O interface is externally connected with a perovskite light emitting diode to control the on-off of the perovskite light emitting diode, the general I/O interface is simultaneously connected with a photoelectric detector to receive electric signals and perform data processing, the processing result is connected with a display device through a USB communication serial port, and the display device is a mobile phone. And the data can also be transmitted to the mobile terminal in a Bluetooth mode by cross-connecting the RXD and TXD serial ports of the singlechip with the RXD and TXD serial ports of the HC-06 wireless serial port Bluetooth module.
The 16 testees were randomly selected and the test site was biceps brachii, because the biceps brachii has better representativeness from the anatomical viewpoint. The comparison standard of the experiment is the thickness value of subcutaneous fat detected by CT (computed tomography). The marked position ensures that the subcutaneous fat thickness value of the same part is measured by different measuring methods. During testing, the light-emitting surface of the device is directed to the skin, and the device is lightly pressed on the measurement part and kept vertical as much as possible, and the data are shown in the following table 1.
TABLE 1
| CT measured value (mm) | Measured value of equipment (mm) | Error (mm) |
| 14.62 | 13.46 | 1.16 |
| 13.24 | 12.32 | 0.92 |
| 12.54 | 11.61 | 0.93 |
| 10.53 | 9.93 | 0.60 |
| 9.32 | 8.80 | 0.52 |
| 8.47 | 8.06 | 0.41 |
| 7.81 | 7.35 | 0.46 |
| 7.13 | 6.68 | 0.45 |
| 6.89 | 6.52 | 0.37 |
| 6.69 | 6.39 | 0.30 |
| 6.53 | 6.25 | 0.28 |
| 5.87 | 5.62 | 0.25 |
| 5.13 | 4.90 | 0.23 |
| 4.25 | 3.99 | 0.26 |
| 3.62 | 3.38 | 0.24 |
| 3.31 | 3.10 | 0.21 |
| 2.95 | 2.66 | 0.29 |
From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: when the fat thickness is greater than 7mm, the error value is greater than 0.3 mm. And when the fat thickness is less than 7mm, the error value is less than 0.3mm, so the measuring device has better test accuracy, is close to the test result of CT, and has simple test operation, practical value and potential of wide application.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. The fat thickness measuring device is characterized by comprising a functional module, a first perovskite light emitting diode, a second perovskite light emitting diode, a photoelectric detector, a controller, a display and a circuit; the controller is electrically connected with each perovskite light emitting diode, the controller is electrically connected with the photoelectric detector, the controller outputs a measurement calculation result to the display, the peak light emitting wavelength of the first perovskite light emitting diode and the peak light emitting wavelength of the second perovskite light emitting diode are 750-800 nm, and the peak light emitting wavelength of the first perovskite light emitting diode is different from the peak light emitting wavelength of the second perovskite light emitting diode.
2. A measurement device according to claim 1, wherein the first perovskite light emitting diode has an emission wavelength of 760nm and the second perovskite light emitting diode has an emission wavelength of 800 nm.
3. A measuring device according to claim 1 or 2, wherein the distance between the first perovskite light emitting diode and the photodetector and the distance between the second perovskite light emitting diode and the photodetector are between 3.5mm and 5mm, and the photodetector is a perovskite single crystal photodetector.
4. The measuring apparatus according to claim 3, wherein the structure of the photodetector includes a perovskite single crystal layer, and a first electrode and a second electrode provided on one side surface of the perovskite single crystal layer with a space therebetween.
5. A measurement device as claimed in claim 1, in which the first perovskite light emitting diode, the second perovskite light emitting diode and the photodetector are all flexible devices.
6. The measurement device according to claim 1, wherein the first perovskite light emitting diode or the second perovskite light emitting diode has a structure including a first electrode layer, an electron transport layer, an interface modification layer, a perovskite light emitting layer, a hole transport layer, an interface buffer layer, and a second electrode layer, which are sequentially stacked.
7. The measurement device according to claim 6, wherein the electron transport layer is a zinc oxide nanocrystal layer, the interface modification layer is a polyethoxyethyleneimine layer, the hole transport layer is a poly [ (9, 9-dioctylfluorene-2, 7-diyl) -co- (4, 4' - (N- (4-sec-butylphenyl) diphenylamine) ] layer, and the interface buffer layer is a molybdenum oxide layer.
8. The measurement device according to claim 7, wherein the thickness of the perovskite light-emitting layer is 20-30 nm, the thickness of the zinc oxide nanocrystal layer and the polyethoxyethyleneimine layer is 30nm, the thickness of the poly [ (9, 9-dioctylfluorene-2, 7-diyl) -co- (4, 4' - (N- (4-sec-butylphenyl) diphenylamine) ] layer is 60nm, the thickness of the molybdenum oxide layer is 7nm, and the thickness of the second electrode layer is 60 nm.
9. The measurement device of claim 1, further comprising a connection strap, wherein the functional module is disposed within a housing, wherein the connection strap is connected to the housing, wherein the housing has a light-transmissive portion, and wherein each of the perovskite light emitting diodes is disposed in correspondence with the light-transmissive portion.
10. The measurement device of claim 9, further comprising a heart rate measurement module, wherein the heart rate measurement module and the functional module are disposed within a housing.
11. The measurement device of claim 10, further comprising a time module, wherein the time module, the heart rate measurement module, and the functional module are disposed within one housing.
12. The measurement device according to claim 1, further comprising a network transmission module for transmitting the measurement calculation result to another network terminal.
13. A mobile network terminal device, characterized by comprising the measurement device of any one of claims 1 to 8.
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