Voltage compensation method based on medical vacuum negative pressure machine

Abstract

The invention relates to the technical field of medical instruments, and particularly discloses a voltage compensation method based on a medical vacuum negative pressure machine. The method comprises the steps of: setting a standard voltage value; collecting current voltage values of different circuits; judging whether the negative pressure machine performs first collection or not according to a first collection air pressure mark; determining a voltage difference value addition and subtraction mark according to the first collection air pressure mark, the standard voltage value and the current voltage values; determining a compensation value according to the first collection air pressure mark, the voltage difference value addition and subtraction mark, the standard voltage value and the current voltage values; and automatically correcting the current voltage values according to the voltage difference value addition and subtraction mark and the compensation value to obtain a final voltage value. According to the voltage compensation method, the consistency of the working voltage of the air pressure sensor can be ensured, so that the consistency of the upper and lower limits of the exhaust air pressure of the negative pressure machine is ensured; and meanwhile, manual repeated testing of the upper and lower limits of the air pressure value and code modification and burning are replaced by uniform code burning, so that the manpower and time cost is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a voltage compensation method based on a medical vacuum negative pressure machine. Background technique [0002] In recent years, negative pressure wound therapy management, as a closed negative pressure therapy technology, has been widely used in various local tissue wound healing treatments. The application of negative pressure wound therapy management technology ensures the formation of a negative pressure environment on the tissue wound surface and promotes wound healing. [0003] At present, the collection of negative pressure values ​​involved in negative pressure wound treatment management technology is based on the research and development design of MEMS piezoresistive pressure sensors. Specifically, the MEMS piezoresistive pressure sensor and the MCU control center are two independent module circuits. Connected by circuit; MEMS piezoresistive pressure sensor is p...

AI Technical Summary

Problems solved by technology

The common MEMS piezoresistive pressure sensors are mostly analog voltage output, that is, analog sensors. This analog voltage output has the following three problems: (1) It is susceptible to electromagnetic interference, and the error of the output signal becomes larger as the cable grows. Self-calibration is required; (2) The analog output range is 6-12mV, the signal is weak, and an additional amplifier circuit is required, but the amplifier circuit will increase the noise signal; (3) There will be temperature effect deviation due to ambient temperature and humidity, and the standard voltage needs to be adjusted value

Images