关键词: 单片机, 多通道, 薄膜压力传感器

Abstract:

This paper designed a multi-channel thin film pressure sensor system based on PIC18F4550 platform. The thin film pressure sensor has the characteristics of small volume and low power consumption, etc. Multi-channel system can pressure sensor at the same time to collect pressure sensor signals and pressure values. This article chooses the PIC (Texas instruments) companys low power consumption MCU PIC18F4550 single-chip microcomputer as the master control chip, combined with the thin film pressure sensor and multi-channel signal acquisition, real-time acquisition of multi-channel pressure sensor data. Adopted the PC software of VC + + write a graphical interface, the interface shows the experiment data. Experiment analyzed the performance of the system, steadily rising pressure analysis, the results did not appear obvious jump, mutations, according to the Newtons value with the pressure value of the rise and rise; Zero pressure stability, the software shows that the maximum value of 1 Newton, with a mean of 0.23 N; Fixed pressure value detection, error all meet the 1% error range Flexi Force thin film pressure sensor.

Key words: MCU, multi , channel, thin film pressure sensor