CN219070283U

CN219070283U - Continuous blood pressure monitoring bracelet based on optical fiber sensing chip

Info

Publication number: CN219070283U
Application number: CN202221719744.5U
Authority: CN
Inventors: 陈志鹏; 孙琪真; 刘云飞; 李良晔
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 2022-07-04
Filing date: 2022-07-04
Publication date: 2023-05-26
Anticipated expiration: 2032-07-04

Abstract

The utility model discloses a continuous blood pressure monitoring bracelet based on an optical fiber sensing chip, and belongs to the field of intelligent wearable equipment. The wrist strap comprises a wrist strap body and a wrist strap, wherein the wrist strap body comprises a body upper cover and a body lower cover, the body upper cover and the body lower cover are fixedly connected through a connecting hole, and an inner cavity is formed in the middle; the inner side of the lower cover of the body is provided with an optical fiber sensing chip, the outer side of the upper cover of the body is provided with a display screen, a circuit board is arranged in the inner cavity, a control chip, a power supply module, a WIFI module and a laser receiving and transmitting module are arranged on the circuit board, a battery is arranged below the circuit board, and the optical fiber sensing chip is used for modulating the intensity of laser by utilizing pulse pressure waves of a wearer of the bracelet body; the control chip is used for collecting the digital signals, extracting pulse wave waveform characteristic values in the digital signals, establishing a relation between the pulse wave waveform characteristic values and blood pressure values, and realizing noninvasive continuous measurement of blood pressure.

Description

Continuous blood pressure monitoring bracelet based on optical fiber sensing chip

Technical Field

The utility model relates to the field of intelligent wearable equipment, in particular to a continuous blood pressure monitoring bracelet based on an optical fiber sensing chip.

Background

The cardiovascular health and disease report of 2021 shows that cardiovascular diseases surpass cancers and diabetes mellitus, become diseases with highest mortality, hypertension is the most dangerous factor in cardiovascular diseases, the number of patients surpasses 2.45 hundred million, blood pressure measurement is the most commonly used examination method for diagnosing cardiovascular diseases clinically, wherein 24-hour dynamic blood pressure monitoring has important significance for diagnosing early hypertension diseases and preventing cardiovascular complications, but the wearable blood pressure monitoring equipment on the market at present cannot realize all-weather continuous and accurate measurement. Currently, watches for measuring blood pressure on the market are mainly divided into photoplethysmography (PPG), pulse wave velocity (ppg+ecg) and pressure (Cuff based), which are worn with decreasing comfort and increasing measurement accuracy.

In chinese patent specification CN207912680U, a bracelet for measuring blood pressure by pulse wave velocity (ppg+ecg) is disclosed, and ECG signals and PPG signals are collected respectively and then transmitted to a signal processing module, and the signal processing module processes the ECG signals and the PPG signals at the same time and then transmits the signals to a mobile terminal. However, the accuracy of the measuring method is greatly influenced by motion artifacts, skin colors and gestures, and is limited by the accuracy of a sensor, so that the measuring error is large.

In chinese patent specification CN215191522U, a bracelet for measuring blood pressure by a pressure method is disclosed, the bracelet uses a micro inflator pump to inflate an air bag in a watchband, and presses a wrist to measure blood pressure, but the method needs to temporarily block blood flow, causing discomfort to a subject, and a single measurement needs to perform an inflation and deflation process, without realizing continuous uninterrupted measurement.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide a continuous blood pressure monitoring bracelet based on an optical fiber sensing chip, and aims to solve the defect that the existing blood pressure bracelet on the market cannot realize active all-weather blood pressure monitoring and solve the problem of low measurement precision, and provides bracelet type blood pressure monitoring equipment with ultrahigh detection precision, low power consumption, small structure, convenient wearing and comfort.

In order to achieve the above purpose, the utility model provides a continuous blood pressure monitoring bracelet based on an optical fiber sensing chip, which comprises a bracelet body and a watchband, wherein the bracelet body comprises a body upper cover and a body lower cover, the body upper cover and the body lower cover are connected and fixed through a connecting hole, and an inner cavity is formed in the middle; the optical fiber sensing chip is arranged on the inner side of the lower cover of the body, the display screen is arranged on the outer side of the upper cover of the body, the circuit board is arranged in the inner cavity, the control chip, the power supply module, the WIFI module and the laser transceiver module are arranged on the circuit board, and the battery is arranged below the circuit board;

the input end of the power supply module is connected with the battery, and the output end of the power supply module is used for supplying power to the circuit board;

the transmitting end of the laser transceiver module is connected with the input end of the optical fiber sensing chip, and the receiving end of the laser transceiver module is connected with the output end of the optical fiber sensing chip; the optical fiber sensing chip utilizes pulse pressure waves of a wearer of the bracelet body to carry out intensity modulation on laser emitted by the laser receiving and transmitting module, and the laser receiving and transmitting module receives the modulated optical signals and converts the modulated optical signals into digital signals;

the control chip is connected with the output end of the laser receiving and transmitting module and is also connected with the display screen; the control chip is used for collecting the digital signals and determining the blood pressure value according to the digital signals.

Further, the laser transceiver module integrates a laser and a light detector by adopting an on-board Chip On Board (COB) technology, and is provided with a laser receiving end and a laser transmitting end, and is used for transmitting laser, receiving the laser and converting an optical signal into a digital signal.

Further, the optical fiber sensing chip consists of a micro-nano optical fiber sensor and a liquid sensitization capsule and is used for modulating the intensity of an optical signal by utilizing pulse pressure waves.

Further, keys for configuring and controlling the bracelet are arranged on the side face of the bracelet body.

Further, a charging interface is arranged on the side face of the bracelet body and connected with a charging chip on the circuit board, and the charging interface is used for charging a lithium battery.

Further, the WIFI module comprises a WIFI antenna; the WIFI antenna is arranged on the side face of the bracelet body and used for communicating with the cloud server and sending information such as blood pressure measurement results.

Further, watchband raw ear mounting holes are reserved at two ends of the bracelet body and used for mounting watchbands.

Furthermore, the watchband is made of Milanine material, and the elasticity of the bracelet is randomly adjusted in a magnetic attraction mode.

Compared with the prior art, the technical scheme of the utility model has the following beneficial effects:

1. the ultra-high precision optical fiber sensing chip arranged on the inner side of the continuous blood pressure monitoring bracelet body based on the optical fiber sensing chip provided by the utility model consists of the micro-nano optical fiber sensor and the liquid drop sensitization capsule, the micro-nano optical fiber sensor utilizes the characteristic that the micro-nano optical fiber has weak binding capacity to the transmitted light beam, the external pressure change deforms the micro-nano optical fiber, so that the transmission loss in the structure is changed, the light intensity is modulated, the ultra-weak pressure detection can be realized, the ultra-weak pressure detection is attached to the pulse position of the wrist of a human body, the pulse waveform with high fidelity can be detected, and the blood flow is blocked by using devices such as an inflatable cuff; the liquid drop sensitization capsule consists of a flexible film and filling liquid, and based on Pascal's law, the strict position alignment requirement between the optical fiber sensing chip and the pulse is greatly relaxed by transmitting the pulse signal detected by the liquid capsule to the micro-nano optical fiber sensor. Based on the two points, the pulse waveform of the wearer can be accurately monitored all-weather.

2. The control chip in the continuous blood pressure monitoring bracelet based on the optical fiber sensing chip provided by the utility model establishes the relation between the pulse wave waveform characteristic value and the blood pressure value, realizes the noninvasive continuous measurement self-correction of the blood pressure, and has high robustness and high precision compared with the traditional pulse wave velocity method and pulse wave transmission time method.

3. According to the continuous blood pressure monitoring bracelet based on the optical fiber sensing chip, the result is finally output to the display screen, meanwhile, the WIFI module is used for uploading data to the cloud server, and a user can pay attention to the change of own blood pressure on the mobile phone APP. When the result is abnormal, the display screen and the APP can send out prompts, so that the response time of treatment and rescue is greatly shortened.

4. The laser receiving and transmitting integrated module based on autonomous design integrates the laser and the optical detector by adopting the COB technology on the board, compared with a coaxial laser device, the laser receiving integrated module greatly reduces the volume of the system and reduces the power consumption of the system, so that the laser receiving integrated module can be integrated in a bracelet, and has low power consumption and small structure.

Drawings

FIG. 1 is a front view of a continuous blood pressure monitoring bracelet based on an optical fiber sensing chip provided by the utility model;

FIG. 2 is a back view of a continuous blood pressure monitoring bracelet based on an optical fiber sensing chip provided by the utility model;

FIG. 3 is an internal view of the lower cover of the body of the continuous blood pressure monitoring bracelet based on the optical fiber sensing chip;

reference numerals: the novel wrist watch comprises a 1-watchband, a 2-body upper cover, a 3-body lower cover, a 4-upper cover and lower cover connecting hole, a 5-optical fiber sensing chip, a 6-display screen, 7-keys, an 8-charging interface, a 9-WIFI antenna, a 10-watchband lug mounting hole, a 11-watchband buckle, a 12-magnet, a 13-optical fiber sensing chip mounting hole, a 14-optical fiber fixing structure, a 15-circuit board mounting hole, a 16-wrist attaching structure, a 17-upper cover and lower cover fixing nut mounting hole and a 18-circuit board fixing nut mounting hole.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not interfere with each other.

The utility model provides a continuous blood pressure monitoring bracelet based on an optical fiber sensing chip, which comprises a bracelet body and a watchband, wherein the bracelet body comprises a body upper cover and a body lower cover, the body upper cover and the body lower cover are connected and fixed through a connecting hole, and an inner cavity is formed in the middle; the optical fiber sensing chip is arranged on the inner side of the lower cover of the body, the display screen is arranged on the outer side of the upper cover of the body, the circuit board is arranged in the inner cavity, the control chip, the power supply module, the WIFI module and the laser transceiver module are arranged on the circuit board, and the battery is arranged below the circuit board;

the control chip is connected with the output end of the laser receiving and transmitting module and is also connected with the display screen; the control chip is used for collecting the digital signals, processing the digital signals and calculating to obtain the blood pressure value.

Referring to fig. 1 and 2, a front view and a back view of a continuous blood pressure monitoring bracelet of an optical fiber sensing chip of the present utility model are shown, respectively. The utility model relates to an optical fiber sensing chip continuous blood pressure monitoring bracelet, which comprises a bracelet body and a watchband 1, wherein the bracelet body is divided into a body upper cover 2 and a body lower cover 3, the body upper cover 2 and the body lower cover 3 are connected and fixed through screws penetrating through an upper cover connecting hole 4 and a lower cover connecting hole 4, the inner side of the lower cover 3 of the bracelet body is provided with an optical fiber sensing chip 5, the main working part of the optical fiber sensing chip is a high-sensitivity micro-nano optical fiber sensor, the effect is to modulate the intensity of an optical signal, the optical fiber generates bending deformation under the action of the pulse wave pressure on the skin surface of a human wrist, the light transmitted in the optical fiber generates light energy leakage under the deformation of different degrees, the optical energy at the output end of the optical fiber sensing chip can be converted into pulse wave data through a photoelectric detector on a circuit board, the sensitivity of the micro-nano-optical fiber sensor is extremely high, the optical fiber sensing chip 5 is aligned and attached to the pulse area during use, the pulse waveform with high fidelity can be detected, the outer side surface of the upper cover 2 of the bracelet body is provided with a display screen 6, the display screen can display data of text, figures and visual figures and display data of the user, the bracelet body is provided with a user interface 7, the user interface is arranged at the side surface of the bracelet is provided with a microphone interface, and a user interface is provided with a microphone interface 10, the user interface is also is provided with a charging Type 10, and the user interface is provided with a microphone interface, and a user interface is provided with a microphone interface, and a charging interface is provided with a 10, and a charging material interface is used for the user interface is connected with a 10. When the watch band is worn, the watch band 1 passes through the watch band buckle 11 and then the magnet 12 is wound back to be attached to the watch band 1.

The micro battery is arranged in the inner cavity of the bracelet body to supply power for a circuit, the optical fiber sensing chip 5 is arranged on the lower cover 3 of the bracelet body, the two ends of the optical fiber sensing chip are respectively connected with the input optical fiber and the output optical fiber of the laser receiving and transmitting module, the output optical fiber of the laser receiving and transmitting module is used for outputting laser, the output laser passes through the optical fiber sensing chip 5 and is subjected to intensity modulation by pulse pressure waves on the skin surface of the wrist of a human body, the modulated optical signals return to the photoelectric detector of the laser receiving and transmitting module through the input optical fiber, the photoelectric conversion is carried out to become electric signals, then the electric signals are processed on the circuit board, and the input optical fiber and the output optical fiber are coiled and fixed in the inner cavity of the bracelet body. The circuit board is connected with the display screen 6 through signal wires. The user starts the measurement through button 7, and after the data that optical fiber perception chip 5 gathered is through circuit board signal processing, output the result to display screen 6, simultaneously with data transmission to high in the clouds server through WIFI antenna 9, the user can use cell-phone APP or display screen 6 to look over blood pressure data.

Referring to fig. 3, an inner cavity view of a continuous blood pressure monitoring bracelet of an optical fiber sensing chip of the utility model is shown, and meanwhile, the inner cavity view is an inner cavity view of a lower cover 3 of a body, and is mainly characterized in that an optical fiber sensing chip mounting hole 13 and an optical fiber fixing structure 14 are specially designed for the optical fiber sensing chip 5, after the optical fiber sensing chip 5 is mounted and fixed in the optical fiber sensing chip mounting hole 13, optical fibers extending at two ends are coiled into a ring shape in a clockwise or anticlockwise direction in the cavity, and sequentially pass through the optical fiber fixing structure 14 to achieve the effect of assisting in fixing and coiling, and the continuous blood pressure monitoring bracelet has the advantages of being convenient for the assembly and fixing of the optical fibers and avoiding breakage of fragile optical fibers in the coiling process. The four corners of the inner cavity are provided with circuit board mounting holes 15, through holes are reserved at the same positions on the circuit board, the circuit board can be fixed in the inner cavity of the bracelet through screws, meanwhile, shaking of the optical fiber and the sensing chip is avoided, and blood pressure measurement errors are reduced.

Fig. 2 shows a back view of the wrist band for continuous blood pressure monitoring with the optical fiber sensing chip of the present utility model, the optical fiber sensing chip 5 is aligned with the wrist pulse beating area, and since the optical fiber sensing chip 5 is not located at the back center of the body of the wrist band, the optical fiber sensing chip 5 is suspended after the user wears the body of the wrist band, the fitting property with the wrist is affected, and the wrist fitting structure 16 is designed to solve this problem, and the structure uses soft materials, and the shape conforms to the radian of the wrist of the human body, so that the fitting property between the optical fiber sensing chip 5 and the wrist is improved while the user wears comfortably, and the blood pressure measurement accuracy is improved. Screws penetrating through the upper cover connecting hole 4 and the lower cover connecting hole 4 on the front face of the bracelet body are additionally provided with nuts at the upper cover fixing nut mounting holes 17 and the lower cover fixing nut mounting holes to be fixed tightly, and screws penetrating through the bracelet inner cavity circuit board mounting holes 15 are additionally provided with nuts at the circuit board fixing nut mounting holes 18 to be fixed tightly.

It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the utility model and is not intended to limit the utility model, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims

1. The continuous blood pressure monitoring bracelet based on the optical fiber sensing chip comprises a bracelet body and a watchband, and is characterized in that the bracelet body comprises a body upper cover and a body lower cover, wherein the body upper cover and the body lower cover are connected and fixed through a connecting hole, and an inner cavity is formed in the middle; the optical fiber sensing chip is arranged on the inner side of the lower cover of the body, and the display screen is arranged on the outer side of the upper cover of the body; a circuit board is arranged in the inner cavity, a control chip, a power supply module, a WIFI module and a laser transceiver module are arranged on the circuit board, and a battery is arranged below the circuit board;

2. The continuous blood pressure monitoring wristband of claim 1, wherein the laser transceiver module integrates a laser and a photodetector using COB technology on a board, and has a laser receiving end and a laser emitting end for emitting laser light, receiving laser light, and converting an optical signal into a digital signal.

3. The continuous blood pressure monitoring wristband of claim 1, wherein the fiber sensing chip is composed of a micro-nano fiber sensor and a liquid sensitization capsule.

4. The continuous blood pressure monitoring wristband of claim 1, wherein the sides of the wristband body are provided with keys for configuring and controlling the wristband.

5. The continuous blood pressure monitoring wristband according to claim 1, wherein a charging interface is arranged on the side face of the wristband body and is connected with a charging chip on the circuit board.

6. The continuous blood pressure monitoring wristband of claim 1, wherein the WIFI module comprises a WIFI antenna; the WIFI antenna is arranged on the side face of the bracelet body and used for communicating with a cloud server and sending blood pressure measurement results.

7. The continuous blood pressure monitoring wristband according to claim 1, wherein watchband ear-producing mounting holes are reserved at two ends of the wristband body.

8. The continuous blood pressure monitoring wristband of claim 1, wherein the wristband is made of milan.