Wireless energy supply high-precision signal processing module for wearable sweat sensor

Abstract

The invention discloses a wireless energy supply high-precision signal processing module for a wearable sweat sensor, which comprises a substrate, a sweat sensor, a radio frequency antenna, a communication circuit, a power supply circuit, a signal processing circuit and an ADC analog-to-digital converter, and is characterized in that the power supply circuit comprises a charge pump circuit, a virtual battery and a voltage stabilizing circuit; the signal processing circuit comprises a voltage following circuit, a programmable gain amplification circuit and a four-order low-pass filter circuit. The size of the gain can be conveniently adjusted through a program according to the size of an output signal of the sensor, and meanwhile, the module can reduce signal loss and well remove interference, so that the measurement data precision of the wearable sweat sensor is effectively improved, and a reader can receive data and analyze and process the data conveniently. Meanwhile, the virtual wireless power supply technology is adopted, so that the equipment does not need to be provided with a battery, the size of the equipment is greatly reduced, and a user can wear the equipment more conveniently.

Description

technical field [0001] The invention relates to a signal processing module, in particular to a wireless energy supply high-precision signal processing module for a wearable sweat sensor. Background technique [0002] Wearable devices, which can record data about the wearer's daily life, have developed rapidly in recent years. At present, some wearable devices can monitor human health status, but their functions are too single. Most of them can only analyze physical signals such as heart rate and blood pressure, and it is difficult to meet the needs of human health monitoring in a deeper level. Human biological fluids, such as extracellular fluid, interstitial fluid, blood, urine, saliva, and sweat, contain a wealth of information about the state of human health. Nowadays, blood testing has become a routine method of physical examination, because blood contains a variety of substances such as proteins, enzymes, carbohydrates, fats, inorganic salts, etc., and the status of hu...

AI Technical Summary

Problems solved by technology

[0005] (2) Potassium: The lack of potassium ions will lead to general weakness, weakened heartbeat, and severe potassium deficiency can also lead to respiratory muscle paralysis

[0008]Most of the existing wearable sweat detection devices are powered by batteries, resulting in these wearable sweat detection devices are large in size, inconvenient for users to wear, and have a short lifespan. Frequent replacement (such as 202010259321.9)

At the same time, in order to improve the detection accuracy of wearable sweat detection devices, most manufacturers of wearable sweat detection devices have invested a lot of energy in the preparation of the sensor itself, but underestimated the design of the signal processing module, such as not considering the actual use The effect of signal loss in

In addition, the signal generated by the sweat sensor is relatively weak and the signal fluctuation is relatively obvious. Most wearable sweat detection devices still only amplify the sweat sensor signal through a simple operational amplifier circuit, and its amplification gain is not adjustable and cannot cope with the surrounding environment. signal interference

The above reasons have all led to the problem of low accuracy of sweat detection equipment

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