Application of medical electronic equipment in signal detection

Imagine that you have a pair of downwind ears, you can hear the faint sounds that ordinary people can’t hear, but if you are in a noisy vegetable market, all kinds of cries one after another, under this kind of interference, your downwind ears can still perform as expected The effect?

In fact, medical Electronic equipment also faces the problems mentioned above, such as electrocardiographs, monitors, ultrasonic diagnostic equipment or nuclear magnetic resonance poppers, which directly contact the human body, especially the equipment that detects human bioelectric signals. The bioelectric signal of the human body is very weak. When it is interfered, a distortion similar to certain lesions will be superimposed on the detection results (such as waveforms, graphics, images) and cause misdiagnosis. Some can also cause micro-electric shocks, and in severe cases, life-threatening. If it is a medical instrument with a computer system, when the peak interference amplitude in the common mode interference reaches 2V~50V and the time lasts for several microseconds, it can cause computer logic errors and information loss.

The bioelectric signals (including electrocardiogram, brain electricity, myoelectricity, eye electricity, skin electricity, membrane electrical signals, etc.) extracted by medical electronic equipment in the human body are relatively weak. Subject to different interferences, and there are many reasons for interference. It may be the interference inside the machine itself, such as the interference caused by the poor shielding of the power supply or the signal channel inside the machine, or external interference, such as the use of high-power electrosurgical units, X-ray machines, short-wave treatment machines, etc. around the patient High-frequency interference caused by physical therapy equipment, etc.

In terms of anti-interference of medical electronic equipment, if you only consider the hardware level and find ways to exclude the influence of external interference on medical signals, there are too many factors to consider. Not only must the signal shielding be strictly considered when designing medical equipment, And in the daily use of the hospital, it is necessary to avoid external interference and mutual interference between equipment.

  

Practitioners find that in most cases, only the hardware approach cannot solve the problem. Only through the combination of hardware and software can the best solution be created. It is understood that Mansenberg, a high-tech company in Shenzhen, has been doing research and development in the field of weak signal extraction. The company’s chief scientist Professor Zhang Tongsheng led a team to develop a variety of algorithms to solve clinical signal interference problems.

The interference and anti-interference of medical equipment is always a headache. On the one hand, medical electronic equipment is susceptible to interference, on the other hand, interference sources are everywhere. It is too costly and difficult to solve from the source. In this way, Mansenberg’s filtering technology (Pre-Sig Detection) provides a new low-cost and efficient way for anti-interference of medical electronic equipment. We also hope that more and more technological inventions can be applied to the market faster to provide more effective protection for the anti-interference of medical electronic equipment.

The Links:   LM190E08-TLGE DG32240-93