基于89BSD的高精度数字压力变换组合  

High precision digital pressure transformation combination based on 89BSD

作　　者：胡晓捷 杨岱旭 杜若楠 HU Xiaojie;YANG Daixu;DU Ruonan(Research on Beijing Remote Sensing Equipment,Beijing 100854,China)

机构地区：[1]北京遥感设备研究所,北京100854

出　　处：《电子设计工程》2025年第6期67-71,共5页Electronic Design Engineering

摘　　要：飞行器测试中,传统的压力传感器测试精度误差较大,同时,针对目前压力传感器体积大、可靠性差等特点,该文结合航天飞行器测试项目,采用89BSD数字压力传感器采集压力信号,采用单片机C8051F410对数字量信号进行采集和D/A转换。单片机芯片具有双通道12位DAC,可以将传感器的数字信号几乎无失真的进行转换,输出0~1 mA的电流信号,经过信号调理电路输出0.2~4.8 V的电压信号供采编器采集。信号调理电路采用TI公司的电源芯片LM1117MPX-5.0 V和LM1117MPX-3.3 V,用于芯片和传感器的供电,保证了供电电压的稳定性。该设计保证了产品的可靠性和高精度,实现了小型化和微功耗,经过测试,传感压力变换组合的精度优于0.16%,优于任务书所提的精度要求。In aircraft testing,traditional pressure sensors have significant accuracy errors,and at the same time,due to the current characteristics of large volume and poor reliability of pressure sensors.This time,in conjunction with the aerospace vehicle testing project,an 89BSD digital pressure sensor is used to collect pressure signals,and a microcontroller C8051F410 is used to collect and convert digital signals.The microcontroller chip has a dual channel 12 bit DAC,which can convert the digital signal of the sensor into a current signal of 0~1 mA with almost no distortion,and output a voltage signal of 0.2~4.8 V through the signal conditioning circuit for the acquisition and editing device to collect.The signal conditioning circuit uses TI’s power chips LM1117MPX-5.0 V and LM1117MPX-3.3 V for the power supply of chips and sensors,ensuring the stability of the power supply voltage.This design ensures the reliability and high precision of the product,achieving miniaturization and micro power consumption.After testing,the accuracy of the sensing pressure transformation combination is better than 0.16%,which is better than the accuracy requirements stated in the task book.

关 键 词：高精度 89BSD C8051F410 小型化 微功耗 

分 类 号：TN98[电子电信—信息与通信工程]