Overpressure protection device for non-invasive sphygmomanometer and threshold setting method thereof

Abstract

The invention discloses an overpressure protection device for a non-invasive sphygmomanometer and a threshold setting method of the overpressure protection device for the non-invasive sphygmomanometer. The overpressure protection device comprises a control device, a rectifier device, a comparator and a pressure sensor, wherein the control device is used for sending different PWM (Pulse Width Modulation) signals to the rectifier device; the rectifier device is used for rectifying the PWM signals and sending a rectified direct-current signal to the comparator; the comparator is used for comparing the direct-current signal with an output signal of the pressure sensor; and when a value of the output signal of the pressure sensor is not less than that of the direct-current signal, the comparator sends a control signal to the control device. Within a certain time if the control device does not receive the control signal, frequencies and duty ratios of the PWM signals are changed and the PEM signals are output, and if the control device receives the control signals, the frequencies and the duty ratios of the PWM signals are stored.

Description

technical field [0001] The invention relates to the technical field of sphygmomanometers, in particular to an overvoltage protection device for a noninvasive sphygmomanometer and a threshold value setting method thereof. Background technique [0002] According to the standard requirements of NIBP (automated non-invasive blood pressure, automated non-invasive blood pressure measurement method), medical non-invasive blood pressure measurement should adopt the dual technology of hardware overvoltage protection and software overvoltage protection to ensure that the blood pressure will not be measured due to excessive inflation pressure. high enough to cause harm to the patient. In the existing technology, the adjustment of the hardware overvoltage protection point of the medical non-invasive blood pressure measurement module is to manually change the resistance value of the variable resistor in the circuit, thereby changing its voltage division value on the circuit. When the vol...

AI Technical Summary

Problems solved by technology

Through the noninvasive sphygmomanometer overvoltage protection device and the threshold value setting method thereof of the present invention, the two major technical problems of manual methods such as inaccurate hardware overvoltage protection point setting, long debugging time and low efficiency can be solved

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