What are the classifications of medical sensors?
I. Classification based on the working principle of the sensor:
1. Chemical Sensors
Using the principles of chemical reactions, chemical components and concentrations are converted into electrical signals.
2. Biosensors
Determination of biochemical substances using selective identification of bioactive substances
3. Physical sensors
Using physical changes of materials
Medical sensors can be broadly classified according to their working principle into:
4. Bioelectric electrode sensor
Various bioelectrical signals in the body (electrocardiogram, electroencephalogram, electromyography, neuronal discharge, etc.)
II. Classification by type of test
This includes displacement sensors, flow sensors, temperature sensors, speed sensors, pressure sensors, etc. For pressure sensors, this includes all sensors capable of detecting pressure, such as metal strain gauge pressure sensors, semiconductor pressure sensors, and capacitive pressure sensors. For temperature sensors, this includes all sensors capable of detecting temperature, such as thermistors, thermocouples, and PN junction temperature sensors.
III. A method for classifying sensors based on the human senses they can replace.
Visual sensors
Includes various optical sensors and other sensors that can replace vision functions;
Hearing sensor
Includes various pickups, piezoelectric sensors, capacitive sensors, and other sensors that can replace auditory functions;
olfactory sensor
It includes various gas-sensitive sensors and other sensors that can replace the function of smell.
What are the applications of medical sensors?
Detection – Detecting normal or abnormal physiological parameters. For example, a blood pressure sensor must be used to measure intracardiac pressure and estimate the degree of defect before surgery for patients with congenital heart disease.
Monitoring – Continuously measuring certain physiological parameters to ensure they are within normal ranges for timely forecasting. In the ICU, this refers to monitors that continuously monitor the body temperature, pulse, blood pressure, respiration, and electrocardiogram of critically ill patients.
What are the classifications of medical sensors? After reading this article, you should have a more comprehensive understanding of medical sensors! Medical sensors are an important type of detection equipment in the biomedical field, effectively improving the efficiency of medical work. It is believed that in the future, the functions of medical sensors will become increasingly practical!
