What are the applications of microcontrollers in medical equipment?

火辣西米秀

What are the applications of microcontrollers in medical equipment? [Copy link]

In fact, microcontrollers are widely used in medical equipment, and are commonly used in small devices. Or some large equipment uses microcontrollers, among which the peripherals of microcontrollers include ADC, iic, pwm storage, serial port, external interrupt, low power mode, watchdog, timer and other applications. There will be differences in specific projects, and specific analysis is required.

　　The most basic application is to measure human blood pressure. Nowadays, this is used for physical examinations in hospitals.

　　Single-chip microcomputers are widely used in the current field of medical equipment. Common blood pressure, blood oxygen, blood sugar, thermometers, forehead thermometers, ear thermometers, nebulizers, biochemical collection system equipment, infrared irradiators, etc. all use 8-bit, 16-bit, or part of 32-bit single-chip microcomputers.

　　Many people will ask if you have a 32-bit microcontroller, is it still a microcontroller? In fact, in the eyes of developers, anything that cannot run Linux can be a microcontroller, such as stm32, which is just much more powerful than the 51 series microcontroller.

　　In medical devices, these usually include power management, display screens or lights, or wireless peripherals such as Bluetooth that can transmit data to other terminals, sensors,

　　Single chip microcomputer battery acquisition, lithium battery or dry battery power supply, using ADC acquisition, the general battery voltage works between 3.4 ~ 4.2, the voltage is divided into several gears, the necessary items can display the battery status, when the battery power is lower than a certain voltage, prompt the battery low.

　　As for the display part, general Class II medical devices will have a display screen, which usually uses an external driver chip to drive the screen. Some microcontrollers have their own broken code screen or color screen driver for direct driving.

　　The human body parameter collection part uses dedicated sensors for blood pressure, blood oxygen, or blood sugar. The sensors are divided into digital and analog types, each with its own advantages. After the microcontroller collects the data, it is filtered by the algorithm, the signal is extracted, and the human body parameters are calculated through the calculation algorithm.

　　Semi-medical microcontroller devices include heart rate monitors. Nowadays, our wristbands have this function.

　　I was shocked when I saw the automated medical equipment in a hospital in Shanghai. First of all, a perfect application of single-chip microcomputers is in medicine dispensing. In the past, many reagents required nurses to spend half a day to prepare. They had to accurately grasp the dosage of each dose and be "fully armed" (because many reagents are harmful to the human body). Later, these medicine dispensing processes were changed to production with automated equipment, which not only improved efficiency and accuracy, but also made it safer under completely sterile conditions.

　　Another application seems to be chemotherapy for patients. Let me give you an example. For patients with thyroid disease, during the initial chemotherapy, because they are in a radioactive environment, this is a dangerous period. Nurses cannot directly contact patients. In the past, daily physical examinations of patients were done by phone calls. The nurses would tell them how to operate, and the patients would follow the instructions. Now, robots have been introduced, and they can patrol every ward and perform physical examinations on patients.