CN106821361A - It is a kind of to make the optically focused servicing unit of simple photoelectricity heart rate sensor measurement result precision - Google Patents

Abstract

A light-gathering auxiliary device for accurate measurement of a simple heart rate sensor. The device system is a semi-open device made of silicon hydrogel material. The device system consists of bidirectional silicone hydrogel convex lenses. Because the heart rate sensor is usually used for measurement by photoplethysmography. Using the principle of optics, the heart rate is calculated after processing. The auxiliary device designed with silicon hydrogel material to gather light, wraps the heart rate sensor, and uses the light-gathering principle of the convex lens to avoid gross errors in the measurement results.

Description

A light-gathering auxiliary device to make the measurement results of a simple photoelectric heart rate sensor more accurate

technical field

The patent of the present invention relates to a health monitoring device, in particular to a light-gathering auxiliary device that makes the measurement results of a simple photoelectric heart rate sensor more accurate.

Background technique

With the development of the economy and the improvement of people's living standards, more and more people pay more and more attention to the health of themselves and their families. Health issues have become the focus of attention. Parameters such as "body temperature, blood pressure, pulse, heart rate" are the most intuitive manifestations of human health, and such health parameters can be directly measured on the surface of the human body. High-precision monitoring parameters play an important role in the analysis of human health. effect. Heart rate sensors on the market generally use photoelectric volumetric method. Blood is red because it reflects red light and absorbs green light. The heart rate sensor uses a green LED light, combined with a light-sensitive photoreceptor, to detect blood flow through the finger at any point in time. When the heart beats, blood flow through the finger increases, and green light absorption increases; between heartbeats it decreases. By flashing the LED light hundreds of times per second, we can calculate the number of heartbeats per minute, which is the heart rate. However, when the simple heart rate sensor emits green LED light, pressing the heart rate sensor hard will damage the sensor device, so we usually place the heart rate sensor at a certain distance or lightly place it on the fingertip. At the same time, the green LED light emitted by the heart rate sensor will not be able to gather light to the surface of the fingertip, resulting in divergence, making the absorbed green light and reflected red light inaccurate, resulting in errors in measurement results. Therefore, the prior art needs to be further improved.

Invention patent content

The purpose of the patent of the present invention is to provide a light-gathering auxiliary device that can make the measurement results of a simple photoelectric heart rate sensor more accurate, and solve the gross error caused by the light scattering of the simple photoelectric sensor. Blood is red because it reflects red light and absorbs green light. The heart rate sensor uses a green LED light, combined with a light-sensitive photoreceptor, to detect blood flow through the finger at any point in time. When the heart beats, blood flow through the finger increases, and green light absorption increases; between heartbeats it decreases. By flashing the LED light hundreds of times per second, we can calculate the number of heartbeats per minute, which is the heart rate. However, when the simple heart rate sensor emits green LED light, pressing the heart rate sensor hard will damage the sensor device, so we usually place the heart rate sensor at a certain distance or lightly place it on the fingertip. At the same time, the green LED light emitted by the heart rate sensor will not be able to gather the light to the surface of the fingertip, resulting in divergence. Take the gather ring and wrap it around the periphery of the heart rate sensor, ensuring that the heart rate sensor and assist device fit snugly without gaps. Put the attached device lightly on the fingertip of the person being measured, connect the heart rate sensor with the microprocessor, and emit green LED light, which passes through the gathering ring, and uses the working principle of the convex lens to gather the light to reduce divergence. Finally, the real-time heart rate of the measured person is calculated by using the photoelectric volumetric method.

The beneficial effects of the patent of the present invention are:

1. The patented structure of the invention is simple and easy to use, which can realize accurate measurement of the heart rate sensor and reduce gross errors.

2. The invention patent can also avoid the direct contact between the components and the skin, and prevent the components from being corroded by human sweat.

detailed description

1. Select the silicone hydrogel material, which is round in shape and slightly larger than the heart rate sensor, and wraps the heart rate sensor.

2. The gathering ring is designed with a semi-open shape, and the shapes on both sides are convex lenses to realize the gathering of light.

3. Connect the heart rate sensor to the microprocessor, and the heart rate sensor emits green LED light.

4. Make sure that the heart rate sensor fits closely with the auxiliary device without any gaps and is lightly placed on the fingertips.

5. The green LED light passes through the gathering ring to gather the light and reduce the divergence. Finally, the heart rate is calculated by the photoelectric volumetric method.

Description of drawings

Fig. 1 is a three-view view of the light-gathering auxiliary device of the patent of the present invention.

Fig. 2 is a structural schematic diagram of the light-gathering auxiliary device of the patent of the present invention.

Fig. 3 is the specific operation flow of the focusing auxiliary device of the patent of the present invention.

Fig. 4 is a structural diagram of the light-gathering auxiliary device of the patent of the present invention.

Fig. 5 is a flow chart of the use of the light-gathering auxiliary device of the patent of the present invention.

Fig. 6 is an operation diagram of the combined use of the light-gathering auxiliary device of the patent of the present invention, a microprocessor, a heart rate sensor, and the like.

Claims (2)

1. An auxiliary device to make the measurement results of a simple photoelectric heart rate sensor more accurate. The manufacturing process is as follows: using the shape of the heart rate sensor as a template, select a silicon hydrogel material to make it slightly larger in area and closer in shape to the selected template The device; the device needs to meet the conditions of wrapping the heart rate sensor; at the same time, the device adopts a semi-open shape design, with convex lenses on both sides, so as to achieve light gathering. In order to clearly reflect the functional characteristics of this device, we named it as a convergent ring. 2. An auxiliary device for making the measurement results of a simple photoelectric heart rate sensor accurate according to claim 1, its use steps are: select a gathering ring and wrap it around the heart rate sensor to ensure that the heart rate sensor and the auxiliary device fit together , no gaps. Put the attached device lightly on the fingertip of the person being measured, connect the heart rate sensor with the microprocessor, and emit green LED light, which passes through the gathering ring, and uses the working principle of the convex lens to gather the light to reduce divergence. Finally, the real-time heart rate of the measured person is calculated by using the photoelectric volumetric method.