联晶智能推出车载led-js4399金沙线

according to the real-time data statistics of johns hopkins university, as of 23:33 on the 7th (11:33 on june 8th, beijing time), the total number of confirmed cases of covid-19 globally exceeded 7 million, reaching 7009065 cases, and the total number of deaths exceeded 402700. covid-19 has seriously threatened the safety of human life. before the vaccine was fully developed, masks, forehead temperature guns, and deep uv disinfection products became important weapons for people to prevent and fight against covid-19. especially the narrow and enclosed interior space of cars is not conducive to air circulation, which can easily breed bacteria and viruses.

recently, lianjing intelligent, a wholly-owned subsidiary of jingke electronics, jointly developed and designed a car mounted sterilization module solution for the interior of automobiles. the module adopts lianjing intelligent's independently developed pcba circuit design solution, combined with jingke electronics' four 270nm band uvc and uva light source designs, combining the sterilization effect of uvc with the strong penetration ability of uva, resulting in higher sterilization rate and better effect.

in addition, jingke electronics has also launched another epidemic prevention tool - the medivac series b.o.t. set infrared blood oxygen testing module, which is used on blood oxygen meters to monitor blood oxygen saturation concentration.

blood oxygen meter refers to an instrument that measures blood oxygen, with the main measurement indicators being pulse rate, blood oxygen saturation, and perfusion index (pi). blood oxygen saturation is one of the important basic data in clinical medicine. the normal value of blood oxygen saturation in the human body is 95%~100%,<90% shows respiratory failure, and<80% shows severe hypoxia. blood oxygen saturation below normal may be: hypoxia, pneumonia, emphysema, altitude hypoxia, blood hypoxia, circulatory hypoxia, tissue hypoxia, etc. therefore, the detection of blood oxygen saturation can indirectly determine the oxygen supply of the human body, which plays an important role in monitoring the prevention of covid-19.

principles of blood oximeter detection

1. when the heart contracts, the arterial blood content increases, but when the heart relaxes, the arterial blood content decreases; the blood content in capillaries, veins, skin, fat, and bones remains almost unchanged during cardiac contraction and relaxation.

2. beer–lambert law can accurately describe the light absorption properties of hemoglobin solution, and can be applied to the analysis of light absorption properties of hemoglobin in blood after approximation.

3. the absorption intensity of hemoglobin red light and infrared light in arteries changes regularly with cardiac pulsation; the intensity of red and infrared light absorbed by tissues such as capillaries, veins, skin, fat, and bones remains almost unchanged with the pulsation of the heart.

4. the light absorption characteristics of oxyhemoglobin (o2hb), deoxyhemoglobin (hhb), carboxyhemoglobin (cohb), and methemoglobin vary greatly. the instrument measures the changes in the absorption intensity of red and infrared light by arterial blood over time δ ared and δ air, calculate the r value, compare it with the calibration curve in the machine memory, and output the spo2 value of blood oxygen saturation after calibration.

at present, there are two main types of photoelectric oximeters on the market. one is the transmission type oximeter commonly used in hospitals, namely the finger clip type oximeter. its working principle is that the characteristics of light will change after it passes through the finger or ear lobe. the blood oxygen content can be obtained through analysis of algorithms analysis of the transmission light characteristics; another type is a reflective blood oxygen meter that uses a reflective photoelectric detection scheme to achieve blood oxygen detection function, which is commonly used on smart watches and bracelets.

the medivac series b.o.t. set infrared blood oxygen testing device combination launched by jingke electronics this time is an emc3030 device independently developed by jingke electronics, which is shipped as a complete set of transmitters and receivers. it uses higher brightness 660nm red led and 905nm near-infrared led, allowing the 350nm-1100nm light response wavelength range and sensitivity to reach 0.7a/w@ λ=λ the pd module with p=940nm can quickly sense the signal of blood oxygen saturation, perfectly meeting the product design requirements of blood oxygen meters. whether it is a transmission type oximeter or a reflection type oximeter product, it can be flexibly assembled and integrated according to the actual design of the product. the compact structural design effectively saves space and facilitates miniaturization of equipment. even in high-temperature environments, the photoelectric performance remains excellent and stable and sensitive.