CN111772608B - Pulse oximeter detection device - Google Patents
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- 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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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
- A61B5/14551—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
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Abstract
The invention provides a pulse oximeter detection device, which comprises a detection light emitting module, a receiving module, a thickness measuring module and a microprocessor, wherein the detection light emitting module and the receiving module are arranged at intervals relatively, a finger of a person to be detected is arranged between the detection light emitting module and the receiving module, the detection light emitting module is used for emitting detection light, and the detection light comprises infrared light and visible red light which are alternately emitted; the receiving module is used for receiving the detection light which is emitted by the detection light emitting module and passes through the finger of the detected person and analyzing the spectral information of the detection light; the thickness measuring module is used for measuring the thickness of the finger of the person to be measured; the microprocessor is respectively connected with the detection light emitting module, the receiving module and the thickness measuring module and is used for receiving the thickness dimension of the measured finger of the person and the spectrum information of the receiving module measured by the thickness measuring module and controlling the detection light emitting module according to the measured thickness dimension of the finger of the person; and calculating the pulse and blood oxygen indexes of the tested person according to the spectral information.
Description
Technical Field
The invention relates to the technical field of instrument and meter equipment of human health detection instruments, in particular to a pulse oximeter detection device.
Background
Pulse Oximetry (PO) is considered to be a key health indicator for the fifth row of the human body. Hemoglobin (Hb) is an important component of blood cells responsible for the transport of oxygen from the lungs to other tissues of the body. The amount of oxygen that hemoglobin contains at any one time is called oxygen saturation, which is the ratio of the oxygen content of hemoglobin to the oxygen carrying capacity of hemoglobin, and is expressed as a percentage. The blood oxygen saturation is an important physiological parameter reflecting whether the respiratory function and the oxygen content of a human body are normal or not, and is an important physiological parameter showing whether each tissue of the human body is healthy or not, and if the human body is seriously anoxic, the human body can directly cause the occurrence of tragedies such as asphyxia, shock, death and the like. Blood oxygen of a patient needs to be monitored in the processes of first aid and transportation, fire rescue and high-altitude flight, and the blood oxygen is also used as a necessary monitoring item by medical personnel during ward visit and out-patient diagnosis; patients with heart diseases, hypertension and diabetes, especially the old, have breathing problems, and in daily life, patients with respiratory diseases, especially patients who snore for a long time and use a breathing machine and an oxygen generator, can use an oximeter to monitor the treatment effect; outdoor sporters, mountain climbing lovers and sports sporters can also use the oximeter to monitor the blood oxygen during sports so as to know the physical condition of the sportsman, mountain climbing lovers and sports sportsmen in time and take necessary protective measures. The blood oxygen index can be monitored to well know whether the respiratory system and the immune system of the user are normal or not, and the blood oxygen saturation becomes an important physiological index for daily monitoring of common families.
The pulse oximeter is a health detection instrument for measuring the oxygen content in the arterial blood of a patient, and can provide noninvasive measurement of the blood oxygen saturation or the arterial hemoglobin saturation; arterial pulsation may also be detected and thus the heart rate of the patient may also be calculated and communicated. Pulse oximeters are generally based on the principle of the variation of the quantity of light absorbed during the arterial pulsation, by alternately illuminating the area to be tested (generally the fingertip or the earlobe) with two light sources respectively positioned in the visible red spectrum (660 nm) and in the infrared spectrum (940 nm), the quantity of light absorbed during these pulsations being related to the oxygen content of the blood; the microprocessor calculates the ratio of the two spectra absorbed and compares the result with a table of saturation values stored in memory to obtain the blood oxygen saturation level. The pulse oximeter generally includes a microprocessor, a memory (EPROM and RAM), two digital-to-analog converters for controlling the LEDs, a device for filtering and amplifying signals received by the photodiodes, and an analog-to-digital converter for digitizing the received signals to the microprocessor. The LED and photodiode are placed in a small probe that is in contact with the patient's fingertip or earlobe, and the pulse oximeter is often also provided with a liquid crystal display.
The control precision of the emitted detection light is not high in the existing pulse oximeter detection, the emitted detection light cannot be adjusted according to the difference of fingers of different detected people, the detection can not be carried out due to insufficient detection light intensity when the thick finger is detected, or the emitted detection light is continuously kept at too high intensity to cause more power consumption, and the pulse oximeter is short in service time and cannot support frequent detection of more times when being carried out.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a pulse oximeter detecting device, which comprises a detecting light emitting module, a receiving module, a thickness measuring module and a microprocessor, wherein the detecting light emitting module, the receiving module, the thickness measuring module and the microprocessor are arranged in the detecting device
The detection light emitting module and the receiving module are oppositely arranged at intervals, a finger of a person to be detected is placed between the detection light emitting module and the receiving module, the detection light emitting module is used for emitting detection light, and the detection light comprises infrared light and visible red light which are alternately emitted;
the receiving module is used for receiving the detection light which is emitted by the detection light emitting module and passes through the finger of the detected person and analyzing the spectral information of the detection light;
the thickness measuring module is used for measuring the thickness of the finger of the person to be measured;
the microprocessor is respectively connected with the detection light emitting module, the receiving module and the thickness measuring module and is used for receiving the thickness dimension of the measured finger of the person and the spectrum information of the receiving module measured by the thickness measuring module and controlling the detection light emitting module according to the measured thickness dimension of the finger of the person; and calculating the pulse and blood oxygen indexes of the tested person according to the spectral information.
Optionally, the pulse oximeter detection device further comprises a first shell and a second shell, the detection light emitting module, the thickness measuring module and the microprocessor are installed in the first shell, the receiving module is installed in the second shell, one ends of the first shell and the second shell are connected through a pin, and the other ends of the first shell and the second shell can be opened to insert the finger of the person to be detected.
Optionally, the hinge pin is sleeved with a torsion spring, the first shell and the second shell are attached to each other under the action of the torsion spring, and the first shell and the second shell have certain clamping force on the fingers of the person to be tested when the finger-type medical instrument is used.
Optionally, the pulse oximeter detection device further includes a battery, the battery is installed inside the second housing, and the battery is used for supplying power to the microprocessor, the detection light emitting module, the thickness measuring module and the receiving module.
Optionally, the pulse oximeter detection device further includes a display screen, the display screen is installed on the outer surface of the first shell and connected with the microprocessor, and the display screen is used for displaying the electric quantity of the battery and the pulse and blood oxygen indexes of the detected person.
Alternatively, the process of controlling the detection light emitting module according to the measured thickness of the measured finger of the person is as follows
First, the minimum detected light intensity required for detecting light is calculated using the following formula:
I min ＝I harvesting machine *10 kd
In the above formula, I min Representing a minimum detected light intensity emitted by the detection light emitting module; I.C. A Harvesting machine The intensity of the detection light received by the receiving module and required for spectral analysis is related to the sensitivity of the receiving module; k represents a proportionality constant, which is related to the wavelength of the detection light emitted from the detection light emitting module and the absorption property of the finger to the detection light; d represents the thickness dimension value of the finger;
secondly, according to the minimum detected light intensity, calculating the input power of the detected light emitting module:
in the above formula, P represents the input power of the detection light emitting module; epsilon represents the light intensity to light energy conversion factor; η represents a power factor of the detection light emitting module;
finally, the microprocessor controls the input power supplied to the detecting light emitting module at the time of measurement according to the calculation result.
Optionally, the microprocessor calculates the pulse and blood oxygen indicators of the measured person as follows:
firstly, smoothing the spectral information of the detection light received and analyzed by the receiving module;
secondly, calculating the blood oxygen index by the following formula:
in the above formula, δ represents a blood oxygen index; a. The Infrared 1 Representing the extinction coefficient of reduced hemoglobin in blood to infrared light; a. The Infrared 2 Indicating the extinction coefficient of oxyhemoglobin in blood to infrared light；A Red 1 Representing the extinction coefficient of the reduced hemoglobin in blood to visible red light; i is Infrared max Indicating the maximum light intensity of the infrared light received by the receiving module; i is Infrared ray min Indicating the minimum light intensity of the infrared light received by the receiving module; i is Red max Indicating the maximum intensity of the visible red light received by the receiving module; i is Red for min The minimum light intensity of the visible red light received by the receiving module is represented;
finally, the pulse is calculated by the following formula:
in the above formula, H represents a pulse; τ represents the spectral sampling frequency received by the receiving module; b Infrared ray Indicating the width of the trough of the infrared light received by the receiving module.
Optionally, the pulse oximeter detection device further includes a voice control module, where the voice control module is connected to the microprocessor and is configured to recognize a voice command and transmit the voice command to the microprocessor, so as to implement voice control on the operation of the pulse oximeter detection device.
Optionally, the pulse oximeter detection device further comprises a fault alarm module, the fault alarm module is connected with the microprocessor, and the fault alarm module is used for detecting a fault condition and sending out fault alarm information.
Optionally, the pulse oximeter detection device is provided with a USB interface and a memory, and the USB interface is used for connecting an external power supply or performing data transmission; the memory is connected with the microprocessor and used for storing fault alarm information and pulse and blood oxygen indexes of a detected person.
The pulse oximeter detection device provided by the invention has the advantages that the thickness measurement module is arranged, the thickness of the finger is measured, the intensity of the detection light to be emitted is calculated and adjusted, the matching and adaptability of the emitted detection light and the finger are improved, the control precision of the emitted detection light is improved, the emitted detection light can be adjusted according to the difference of the fingers of different detected persons, the existing effective detection is confirmed, the power consumption is reduced, the detection is more energy-saving, the use for a longer time can be supported in the occasion of carrying out outgoing use, and the frequent detection requirement for more times can be supported outdoors.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which 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 principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a functional block diagram of a pulse oximeter detection device according to an embodiment of the present invention;
FIG. 2 is a front perspective view of an embodiment of a pulse oximeter detection device of the present invention;
FIG. 3 is a schematic rear perspective view of an embodiment of a pulse oximeter detection device according to the present invention;
fig. 4 is a perspective view of the internal structure of the pulse oximeter detection device according to the present invention.
In the figure: 1-a first shell, 2-a second shell, 3-a display screen, 4-a finger extending end, 5-a UBS interface, 6-a torsion spring and 7-a battery.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it should be understood that they are presented herein only to illustrate and explain the present invention and not to limit the present invention.
As shown in FIG. 1, the embodiment of the present invention provides a pulse oximeter detecting device, which comprises a detecting light emitting module 10, a receiving module 20, a thickness measuring module 30 and a microprocessor 40, wherein
The detection light emitting module 10 and the receiving module 20 are arranged at an interval, a finger of a person to be detected is placed between the detection light emitting module 10 and the receiving module, and the detection light emitting module 10 is used for emitting detection light which comprises infrared light and visible red light which are emitted alternately;
the receiving module 20 is configured to receive the detection light emitted by the detection light emitting module 10 and passing through the finger of the person to be detected, and analyze spectral information of the detection light;
the thickness measuring module 30 is used for measuring the thickness of the finger of the person to be measured;
the microprocessor 40 is respectively connected with the detection light emitting module 10, the receiving module 20 and the thickness measuring module 30, the microprocessor 40 is used for receiving the thickness dimension of the measured finger of the person measured by the thickness measuring module 30 and the spectrum information of the receiving module 20, and controlling the detection light emitting module 10 according to the measured thickness dimension of the measured finger of the person; and calculating the pulse and blood oxygen indexes of the tested person according to the spectral information.
The working principle and the beneficial effects of the technical scheme are as follows: through setting up thickness measurement module, thickness through to the finger is measured, detect light intensity and adjust with this calculation needs to send, the matching and the adaptability of the detection light that send and finger have been improved, the detection light control accuracy to sending has been improved, can adjust the detection light that sends according to the difference that different measurands indicate, when confirming that current effect detects, power consumption has been reduced, it is more energy-conserving to detect, under the occasion of carrying out the use, can support longer use of catching up with time, can support the frequent detection needs of more number of times outdoors.
In one embodiment, the pulse oximeter detection device further includes a first housing 1 and a second housing 2, the detection light emitting module 10, the thickness measuring module 30 and the microprocessor 40 are installed in the first housing 1, the receiving module 20 is installed in the second housing 2, one end of the first housing 1 and one end of the second housing 2 are connected by a pin, and the other end of the first housing 1 and the other end of the second housing 2 can be opened to insert a finger of a person to be detected, i.e. to form a finger extending end 4; the round pin epaxial cover establishes torsional spring 6, first casing 1 and second casing 2 keep the laminating under torsional spring 6's effect, and first casing 1 and second casing 2 then have certain clamping-force to surveyed people's finger when using.
The working principle and the beneficial effects of the technical scheme are as follows: the pulse oximeter detection device is designed into two parts which can be overlapped, the detection light emitting module and the detection light receiving module are respectively positioned at different parts, the two parts are overlapped to clamp the finger of a person to be detected, and the finger is subjected to light transmission detection in a non-invasive mode; the torsional spring makes this product can open like the clip and press from both sides tightly, and two parts remain inseparable combination throughout when no exogenic action, and easy and simple to handle during the use, the design is small and exquisite, conveniently carries outdoor use.
In one embodiment, the pulse oximeter detection device further comprises a display screen 3 and a battery 7, the display screen 3 is installed on the outer surface of the first housing 1 and connected with the microprocessor 40, and the display screen 3 is used for displaying the electric quantity of the battery 7 and the pulse and blood oxygen indexes of the person to be measured; the battery 7 is installed inside the second housing 2, and the battery 7 is used for supplying power to the microprocessor 40, the detection light emitting module 10, the thickness measuring module 30 and the receiving module 20.
The working principle of the technical scheme is as follows: the display screen can adopt an LED screen or a touch liquid crystal screen and is used for displaying the electric quantity of the battery 7 and the pulse and blood oxygen indexes of the tested person; the battery can adopt a dry battery such as a No. 5 dry battery or a No. 7 dry battery, and can also adopt a rechargeable battery or a rechargeable aluminum battery and the like.
The beneficial effects of the above technical scheme are: by arranging the display screen, the measurement result can be visually displayed in time, and the operation of a single person is facilitated; the battery is arranged, so that the product can be freely carried out or used in a mobile position as required without being connected with a commercial power fixed contact, the use freedom is enhanced, and the use occasion is enlarged.
In one embodiment, the process of controlling the detecting light emitting module according to the measured thickness dimension of the measured human finger is as follows
First, the minimum detected light intensity required for detecting light is calculated using the following formula:
I min ＝I harvesting machine *10 kd
In the above formula, I min Representing a minimum detected light intensity emitted by the detection light emitting module; I.C. A Harvesting machine The intensity of the detection light received by the receiving module and required for spectral analysis is related to the sensitivity of the receiving module; k represents a proportionality constant, which is related to the wavelength of the detection light emitted from the detection light emitting module and the absorption property of the finger to the detection light; d represents a thickness dimension value of the finger;
secondly, according to the minimum detected light intensity, calculating the input power of the detected light emitting module:
in the above formula, P represents the input power of the detection light emitting module; epsilon represents the light intensity and light energy conversion factor; eta represents the power factor of the detection light emission module;
finally, the microprocessor controls the input power supplied to the detecting light emitting module at the time of measurement according to the calculation result.
The working principle and the beneficial effects of the technical scheme are as follows: the scheme selects a mode and a related algorithm for adjusting the detection light intensity emitted by the detection light emitting module, the adopted algorithm is simple and scientific, the calculated amount is small, the calculation speed is high, energy and electricity are saved, the relation between the detection light intensity and the input power of the detection light emitting module is established through the algorithm so as to adjust the input power mode, the accurate control of the detection light intensity is realized, the matching and the adaptability of the emitted detection light and fingers are improved, the electric energy waste and the consumption are reduced on the basis of ensuring the detection, and the outdoor service time is prolonged.
In one embodiment, the microprocessor calculates the pulse and blood oxygen indicators of the tested person as follows:
firstly, smoothing the spectral information of the detection light received and analyzed by the receiving module;
secondly, the blood oxygen index is calculated by the following formula:
in the above formula, δ represents the blood oxygen index; a. The Infrared 1 Representing the extinction coefficient of reduced hemoglobin in blood to infrared light; a. The Infrared 2 Represents an extinction coefficient of oxyhemoglobin in blood to infrared light; a. The Red 1 Representing the extinction coefficient of reduced hemoglobin in blood to red light; I.C. A Infrared max Indicating the maximum light intensity of the infrared light received by the receiving module; i is Infrared ray min Indicating the minimum light intensity of the infrared light received by the receiving module; i is Red max Indicating the maximum intensity of the visible red light received by the receiving module; I.C. A Red for min Indicating the minimum light intensity of the visible red light received by the receiving module;
finally, the pulse is calculated by the following formula:
in the above formula, H represents a pulse; τ represents the spectral sampling frequency received by the receiving module; b Infrared ray Indicating the width of the trough of the infrared light received by the receiving module.
The working principle and the beneficial effects of the technical scheme are as follows: the burr interference signal in the signal can be removed through smoothing processing, and the interference of the noise signal is reduced; the most common hemoglobins in human blood are 4 types: oxygenated hemoglobin, reduced hemoglobin, carboxyhemoglobin, and methemoglobin. Among them, oxyhemoglobin and reduced hemoglobin belong to functional hemoglobin, and carboxyhemoglobin and methemoglobin belong to dysfunctional hemoglobin. The function of functional hemoglobin is to transport oxygen, while dysfunctional hemoglobin is unable to bind and release oxygen, of which carboxyhemoglobin is the most common dysfunctional hemoglobin. Hemoglobin acts like a filter for light of different wavelengths, passing light having wavelengths in the red to infrared portion of the spectrum, while blocking light of other wavelengths. The extinction coefficient of hemoglobin is characterized by the absorption capacity of hemoglobin to light: the larger the extinction coefficient value is, the stronger it absorbs light; conversely, the smaller the extinction coefficient value, the weaker the absorption of light. The components of carboxyhemoglobin and methemoglobin in human blood are few relative to oxyhemoglobin and reduced hemoglobin, and the influence of the carboxyhemoglobin and the methemoglobin can be generally ignored; therefore, the above formula for calculating the blood oxygen index only focuses on the influence of oxygenated hemoglobin and reduced hemoglobin, so as to simplify calculation, reduce the difficulty of detection and enhance the detection speed. Whereas for the detection of a pulse it is directly related to the width of the trough of the detected spectrum only.
In one embodiment, the pulse oximeter detection device further comprises a voice control module, which is connected to the microprocessor 40 and is configured to recognize a voice command and transmit the voice command to the microprocessor 40, so as to implement voice control of the operation of the pulse oximeter detection device.
The working principle and the beneficial effects of the technical scheme are as follows: by arranging the voice control module, the intellectualization of the product is improved, the operation and the use of a part of people with certain disabilities are facilitated, the use obstacles are reduced, and the use convenience is further improved; on the basis, broadcasting can be added to provide voice broadcasting of the detection result.
In one embodiment, the pulse oximeter detection device is provided with a USB interface 5, a fault alarm module and a memory, wherein the USB interface 5 is used for connecting an external power supply or performing data transmission; the fault alarm module and the memory are connected with the microprocessor 40, the fault alarm module is used for detecting fault conditions and sending fault alarm information, and the memory is used for storing the fault alarm information and pulse and blood oxygen indexes of a detected person.
The working principle and the beneficial effects of the technical scheme are as follows: by arranging the fault alarm module, the self-checking capability of the product is enhanced, and the current state of the product is timely reminded so as to be convenient for timely maintenance when needed; through configuration memory, improve the storage persistence and the security of testing result data, through equipment USB interface, firstly conveniently carry in time supplementary electric quantity when going out, secondly can export relevant quantity such as testing result and backup, further improve data security.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. The detection device of the pulse oximeter is characterized by comprising a detection light emitting module, a receiving module, a thickness measuring module and a microprocessor, wherein the detection light emitting module, the receiving module, the thickness measuring module and the microprocessor are arranged in the detection device
The detection light emitting module and the receiving module are arranged oppositely at intervals, a finger of a person to be detected is placed between the detection light emitting module and the receiving module, the detection light emitting module is used for emitting detection light, and the detection light comprises infrared light and visible red light which are emitted alternately;
the receiving module is used for receiving the detection light which is emitted by the detection light emitting module and passes through the finger of the detected person and analyzing the spectral information of the detection light;
the thickness measuring module is used for measuring the thickness of the finger of the person to be measured;
the microprocessor is respectively connected with the detection light emitting module, the receiving module and the thickness measuring module and is used for receiving the thickness dimension of the measured finger of the person and the spectrum information of the receiving module measured by the thickness measuring module and controlling the detection light emitting module according to the measured thickness dimension of the finger of the person; calculating pulse and blood oxygen indexes of the detected person according to the spectral information;
the process of controlling the detection light emitting module according to the measured thickness dimension of the measured human finger is as follows:
first, the minimum detected light intensity required for detecting light is calculated using the following formula:
in the above formula, the first and second carbon atoms are,
representing the minimum detected light intensity emitted by the detecting light emitting module;
the intensity of the detection light received by the receiving module and required for spectral analysis is related to the sensitivity of the receiving module;
a proportionality constant is expressed, and is related to the wavelength of the detection light emitted by the detection light emitting module and the absorption property of the finger on the detection light;
a thickness dimension value representing a finger;
secondly, according to the minimum detected light intensity, calculating the input power of the detected light emitting module:
in the above-mentioned formula, the compound has the following structure,
representing the input power of the detection light emitting module;
representing a light intensity to light energy conversion factor;
representing a power factor of detecting the light emitting module;
finally, the microprocessor controls the input power supplied to the detecting light emitting module at the time of measurement according to the calculation result.
2. The pulse oximeter detection device according to claim 1, further comprising a first housing and a second housing, wherein the detection light emitting module, the thickness measuring module and the microprocessor are installed in the first housing, the receiving module is installed in the second housing, one end of the first housing and one end of the second housing are connected by a pin, and the other end of the first housing and the other end of the second housing can be opened to insert a finger of a person to be detected.
3. The pulse oximeter detection device according to claim 2, wherein the pin is sleeved with a torsion spring, the first housing and the second housing are kept attached to each other under the action of the torsion spring, and the first housing and the second housing have a certain clamping force on the finger of the person to be detected when the device is used.
4. The pulse oximeter detection device according to claim 1, further comprising a battery mounted inside the second housing, the battery being configured to power the microprocessor, the detection light emitting module, the thickness measuring module, and the receiving module.
5. The pulse oximeter detecting device according to claim 4, further comprising a display screen, wherein the display screen is installed on an outer surface of the first housing and connected to the microprocessor, and the display screen is used for displaying the battery level and the pulse and blood oxygen index of the person to be detected.
6. The pulse oximeter detection device according to claim 1, wherein the microprocessor calculates the pulse and blood oxygen indexes of the person to be detected as follows:
firstly, smoothing the spectral information of the detection light received and analyzed by the receiving module;
secondly, calculating the blood oxygen index by the following formula:
in the above formula, the first and second carbon atoms are,
representing a blood oxygen indicator;
representing the extinction coefficient of infrared light by the reduced hemoglobin in blood;
represents an extinction coefficient of oxyhemoglobin in blood to infrared light;
representing the extinction coefficient of reduced hemoglobin in blood to red light;
indicating the maximum light intensity of the infrared light received by the receiving module;
indicating the minimum light intensity of the infrared light received by the receiving module;
indicating the maximum intensity of the visible red light received by the receiving module;
the minimum light intensity of the visible red light received by the receiving module is represented;
finally, the pulse is calculated by the following formula:
in the above formula, the first and second carbon atoms are,
representing a pulse;
representing the spectral sampling frequency received by the receiving module;
indicating the width of the trough of the infrared light received by the receiving module.
7. The pulse oximeter detection device according to claim 1, further comprising a voice control module, wherein the voice control module is connected to the microprocessor, and is configured to recognize a voice command and transmit the voice command to the microprocessor to perform voice control on the operation of the pulse oximeter detection device.
8. The pulse oximeter detection device according to any one of claims 1-7, further comprising a malfunction alarm module, the malfunction alarm module being connected to the microprocessor, the malfunction alarm module being configured to detect a malfunction condition and send out a malfunction alarm message.
9. The pulse oximeter detection device according to claim 8, wherein the pulse oximeter detection device has a USB interface and a memory, the USB interface is used for connecting an external power source or performing data transmission; the memory is connected with the microprocessor and used for storing fault alarm information and pulse and blood oxygen indexes of a detected person.
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