Special signal generator for medical treadmill exercise calibration

Abstract

The invention discloses a special signal generator for medical treadmill exercise calibration. The signal generator comprises a power module, a DA wave generating module, a chip wave generating module and a waveform output interface module. The power module is used for supplying power to the DA wave generating module and the chip wave generating module; and a standard heart rate signal, which is transmitted by the DA wave generating module, and sine waves and square waves, which are transmitted by the chip wave generating module, are outputted by virtue of the waveform output interface module. Meanwhile, the signal generator disclosed by the invention, in accordance with waveforms and indicators required by the medical treadmill exercise calibration, can achieve the reversal design of the input digital quantity and attenuation multiple of a digital-to-analogue conversion chip in an amplitude regulating module and the capacitance values of 11 capacitors in a frequency regulating module. The signal generator disclosed by the invention is specially applicable to the calibration of medical treadmill exercise electrocardiograph parameters, and the signal generator has the advantages of stable output waveform, convenient calibration and the like.

Description

technical field [0001] The invention relates to a medical signal generator, in particular to a signal generator specially used for calibration of a medical sports tablet. Background technique [0002] With the improvement of living standards, the acceleration of the pace of life and the lack of time for sports, coronary heart disease has become the main disease that threatens the health of our people. Usually, coronary heart disease has the characteristics of strong concealment. Even though the maximum reserve capacity of coronary artery dilatation has been significantly reduced in many patients, the coronary blood flow can still maintain normal at rest, without myocardial ischemia, and static electrocardiogram show normaly. Patients have no obvious symptoms before the onset of the disease, and are easily overlooked. Once the onset of the disease occurs, it is easy to form myocardial infarction and lead to sudden death. Therefore, improving the accuracy of diagnosis of pat...

AI Technical Summary

Problems solved by technology

The existing signal generator has high frequency, large waveform amplitude and low precision, which is not suitable for the calibration of ECG parameters of medical exercise tablets

Existing medical signal generators cannot easily output waveforms of specific frequencies and amplitudes, and the stability is difficult to guarantee. This type of medical signal generator is mostly used for maintenance, debugging and testing of medical equipment. Therefore, there is currently no dedicated Signal generator calibrated for medical sports tablet

[0005] In terms of technical implementation, most of the existing medical signal generators are analog circuit, chip and data packet. Calibrate the heart rate signal; the data packet wave can send the standard heart rate signal, but the requirement for the density of the waveform data is extremely high, and the frequency adjustment is very difficult

Images