Sensor comparison of intelligent mattress

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 Sensor comparison of intelligent mattress


It sounds very good. In principle, it can monitor the sign signal, and then separate out the heart rate, breath and other results. Lets take a look at the morphology and characteristics: the optical fiber sensor has high accuracy due to its optical transmission, and can automatically adjust the transmission intensity, angle, frequency or other transmission parameters in the algorithm according to different scenarios and needs, Until the optimal parameters are obtained, it can flexibly adapt to various scenes, different human differences and different sleeping positions. At the same time, because of its high sensitivity, the optical fiber sensor can generally achieve the accurate monitoring of 40 cm from the human body. Optical fiber sensors generally coil or lay the optical fiber on the plane, and then use protective materials to wrap the optical fiber. The optical fiber sensor can flexibly change any shape, which is especially suitable for planar acquisition scene. However, due to the difficulty in mastering the manufacturing process and the low selection of manufacturers, the cost is high when the scale of use is small.

The piezoelectric thin film sensor is generally made of general-purpose materials, which is simple and low-cost. Each manufacturer buys back the film and cuts it by himself. Usually, a piece of sheet film with the size of 60cmx20cm is produced by extrusion deformation. Because the principle of piezoelectric film is to produce electrical signal change through extrusion deformation, long-distance transmission will face voltage attenuation and consistency problems. It is very difficult to achieve larger size, but the size is smaller If it is too small, it will reduce the transmission of human body pressure and lead to inaccurate monitoring. At the same time, because of the poor sensitivity of the piezoelectric film, in order to capture the sign signal as much as possible, we have to sacrifice the comfort degree and place it close to the human body instead of under the ordinary mattress. This will lead to the impact of wrinkles and pressing, which will make the attenuation and consistency of the sensor worse. Therefore, the service life of the piezoelectric film is mostly limited to 8-10 months, And with the use of time, the accuracy and consistency become worse and worse.

Due to the chip packaging, MEMS sensor has the advantages of easy production, high consistency and low cost. It is very suitable for the single point pressure monitoring scene, but when it is in the plane scene monitoring, it will appear that the force is not satisfied because of the rigid pressure conduction and the contact area is too small, which often can not be applied to the scene of physical signs monitoring.

In principle, piezoelectric thin film sensor is a kind of semi-contact sensor with low sensitivity and slow response speed. MEMS sensor is a rigid and single point monitoring sensor, while optical fiber sensor is a non-contact sensor with surface shape, high precision, high sensitivity and response speed.

Through the improvement of manufacturing process in recent years, the production technology of optical fiber sensor has been gradually mastered. Therefore, we can see that the main sensor of Gucci innovative monitoring pad is optical fiber sensor. In recent years, it has been batch applied in hospitals, nursing homes, office chairs and other scenes, which has become a non-contact physical sign on the market The piezoelectric thin film sensor has been widely used for many years, with low price and fashionable appearance. It also exists in all kinds of occasions where the actual monitoring effect is not high but the cost is very sensitive. Source: editor in charge of mass news: Chen Tiqiang_ NB6485

Product drawing of Gucci innovation monitoring pad

After the improvement of manufacturing process in recent years, the production technology of optical fiber sensor has been gradually mastered. Therefore, we can see that the main sensor of the monitoring pad produced by Gucci is the optical fiber sensor. In recent years, it has been applied in hospitals, nursing homes, office seats and other scenes in batch, which has become the first choice of non-contact physical sign monitoring scheme on the market The electric thin film sensor has been widely used for many years, with low price and fashionable appearance. It also exists in various occasions where the actual monitoring effect is not high but the cost is very sensitive.