Implementation of medical monitoring system based

Implementation of medical monitoring system based on infrared technology

in the hospital, in order to make patients get better care or slowly unscrew the oil delivery valve for experimental observation and research, the monitoring system is indispensable. At present, most of the monitoring systems used in hospitals are television systems and low light level monitoring systems, which have high requirements for light, while the medical monitoring system based on infrared imaging technology does not have this problem

hardware implementation

as shown in Figure 1 and Figure 2, the whole infrared monitoring system is divided into two parts: one part is placed in the patient ward to obtain patient information, which is called the front end; The other part is placed in the monitoring room and is responsible for providing patient information to the guardians, which is called the back end; Wired, wireless or infrared video transmission can be carried out between the two according to the situation

Figure 1 the infrared monitoring system shall not violently impact the inclined block on the swing arm on the front end of the system

Figure 2 the focusing module at the rear end of the infrared monitoring system

controls the optical focusing of the lens to ensure the clarity of imaging quality. Infrared detector is the core of the whole system, "Graphene used in textile raw materials also needs to formulate market access standards, which are responsible for converting the collected infrared signals into video electrical signals. The support module provides appropriate bias voltage to ensure the normal operation of the infrared detector. The function of the correction module is to provide a uniform infrared intensity reference point for the infrared detector, which is an essential module to ensure correct imaging. Electronic zoom is a supplement to optical zoom, which can be in a relatively small range Carry out more detailed focusing control. Because the characteristics of each detection element of the infrared detector are inconsistent, the bias voltage provided by the support module can not meet the normal work needs of all detection elements, so that a small number of detection elements can not work normally, which will affect the quality of the image, and this problem is solved by the bad element processing module

the infrared signal generated by the human body is focused by the infrared lens and converged on the detection plane of the infrared detector. Under the cooperation of the support module, the correction module and the electronic zoom module, the infrared detector in the normal working state converts the received infrared signal into the initial video electrical signal, and outputs this signal to the subsequent processing module in a specific format. After bad element processing and nonlinear correction, the target video signal is formed. The target video signal is then encoded and sent to the back end of the system

the back end receives the video coding sent by the front end, first decodes it, and then sends it to the subsequent module for further processing. The decoded video signal is electronically amplified (or not amplified) as required, and then directly sent to the display and control module to realize real-time monitoring; At the same time, it is sent to the storage module for coding storage for future needs. The analysis module analyzes the video signal sent. If the patient has an uncomfortable reaction, it triggers the alarm module to remind the medical staff to take measures

software implementation

the software flow of the infrared monitoring system is shown in Figure 3. After the system is powered on and started, conduct self-test first. If an error is found in the self-test, the error will be reported on the back-end monitor and the fault code will be provided to assist in analysis and judgment. If the self-test is normal, start the infrared detector for electronic correction and electronic focusing. When it is ready, send work instructions to the infrared detector, and the infrared detector begins to receive and process the infrared signal. According to the settings of the supervisor, the processed images can be stored and displayed for real-time monitoring, or only for real-time monitoring. If necessary, the processed image is also sent to the computer for automatic analysis. If the patient is found to have discomfort symptoms, an alarm will be issued

Figure 3 software flow chart of infrared monitoring system

comparison with traditional monitoring system

traditional medical monitoring system is generally a television system, in a few cases, it is a low light level system, or both. In the daytime with sufficient light, the TV medical monitoring system can well realize the monitoring function. However, in rainy weather, the imaging quality of the TV system will be affected to a certain extent. In the evening, unless the light is turned on, the TV system will completely fail to work, and turning on the light is bound to affect the rest of patients, so the TV monitoring system has great limitations

for low light level medical monitoring system, it can only work in a certain brightness range. During the day, because the signal input is too strong and the visibility is very poor, it is impossible to observe the patient's situation normally, and even the system may be burned due to too strong light. When the light is too dark, or even there is no light source at all, the low light level system can also not realize the monitoring of patients. Even with the automatic gain control system, it can only alleviate the above problems to a certain extent, and this practice needs to pay a corresponding price in terms of cost, volume and weight

infrared medical monitoring solves the above problems. Because the infrared monitoring system receives the infrared signal sent by the patient's body, the system is not affected by any visible light, whether it is strong, weak, with or without, and can work normally all day. Especially when monitoring at night, no additional treatment is required, which will not adversely affect the rest of patients. Moreover, the change of infrared signal intensity caused by the change of patient's temperature is not very dramatic, and it is only a narrow range for the infrared system, which will not affect the normal operation of the infrared system at all. On the contrary, this change can also be clearly reflected on the monitor, so as to remind medical staff of the need to care for patients. Neither TV system nor low light level system can reflect this change. Therefore, the infrared system not only makes up for the shortcomings of TV system and low light level system, but also realizes a more powerful monitoring function

conclusion

the imaging quality of the infrared monitoring system is stable and clear, and the movement of eyebrows and other details can be observed, which can fully meet the needs of observation. By analyzing the image with software, when the patient has an uncomfortable condition, it can send an alarm, take appropriate supporting measures, and even realize unattended monitoring. Because the infrared monitoring system adopts the passive working mode, the infrared needed for its work is naturally emitted by the human body, so its dynamic performance has gradually attracted people's attention. It is a pollution-free and environmental protection monitoring system, especially suitable for medical treatment. (end)