压力传感器特性研究实验的ANSYS辅助教学

基于ANSYS的应力分析功能进行压力传感器特性研究,用ANSYS数值计算方法分析了压力传感器的弹性平行梁。数值计算结果表明,压力传感器的节点位移与压力之间存在线性关系,说明在一定范围内,输出电压与被测物体的重量成正比,和实验结果一致。计算机仿真手段能够得到直观弹性平行梁应力云图,更可以用动画生动的应力作用实验过程和结果。一定程度上弥补了实验教学手段的不足,展示普通实验无法完成的实验内容,还可以清楚地知道电阻应变片应该固定的具体位置。     

适用于无线传感器网络分簇算法研究

无线传感器网络拓扑控制算法对于延长网络的生存时间、减小通信干扰、提高路由协议和MAC协议的效率等具有重要的意义。根据无线传感器网络的分簇机制,有效地利用成簇算法均衡网络节点负载,降低能耗,从簇首的选择、簇组织和簇的路由三个方面系统地分析当前典型的成簇算法,对算法的特点和适用情况进行比较分析,并指出目前算法存在问题和改进措施。     

基于电阻应变式传感器的测力系统

本文介绍了基于电阻应变式传感器的测力系统设计方案,此方案可以直接用于工业生产中小重力高精度的测量,属于自行设计制造的一种小型测量仪器。首先利用OP-07将应变片输出的微弱电压信号进行初级放大,经过多路模拟开关MC14051B进行分时选通。然后利用OP—07组成的放大电路将该信号进行二次放大,放大后的电压信号送入ADC0804中进行模数转换,转换完的数据经单片机AT89C52进行防脉冲干扰平均值滤波、自校准和数据融合处理后存储到非易失性数据存储器DS1225Y中。     

Vibration shape testing of space sheet structure

The space sheet for a solar array structure is large in dimension, and flexible to induce complex distortion. It is difficult to measure the distortion. A large-scale flexible test prototype system is built for sheet structure vibration monitoring based on the vibration information of the solar array in space. The system provides an intelligent test method for flexible space structure with embedded sensors and non-visualization reinstruction. Multiple fiber Bragg grating （FBG） sensors are packaged and embedded into the structure with spatial division multiplexing （SDM） and wavelength division multiplexing （WDM）. The sensor interrogator distinguishes wavelength shifts that can be turned into curvature of the curve. The structure shape is reconstructed based on the curvature information and the arc-length, and then displayed. The experiment shows that the system has a high FBG sensitivity. The reconstruction algorithm is fast with high precision. The system has great potential for use in health monitoring of the space sheet structure.     

Zigbee-based new approach to smart home

Smart home is a promising solution to improving the quality of people＇s life. Much work has been done in the field, but most of these solutions are just based on home gateway, leaving much to be improved. One of its defects is the relatively high energy consuming and its radiation, and the other is that it is not available to the old home appliances which fail to access the internet. Full use of the low energy consuming characteristic of the Zigbee wireless sensor network, a completely new smart home solution is put forward in this paper. Without need of a home gateway and any modification for the currently used family appliances, the method uses the Zigbee coordinator as the central controller and the controllers of appliances as the end devices of Zigbee. It can realize a comfortable and smart home. Experiments show that the scheme proposed is feasible and it will be no doubt to be able to improve the quality of people＇s daily life.     

一款基于HOLTEK MCU的智能玩具的设计与实现

以HT46F49E为核心芯片,DS18B20、DHT11、ISD1760、SST89E516RD为辅助芯片,设计了一种家庭玩具或用品.它用温度传感器、湿度传感器实现温度和湿度的数据采集,通过LCD240128来显示温湿度、模拟时钟,并动态地显示＂喜洋洋＂的表情.其表情会随环境温度、湿度的变化而变化,并发出温馨的语音提示.     

流量的测量、安装及维护

节流装置、流体连续性方程、伯努利方程、流量系数α、流出系数C、安装、维护.     

《传感器与检测技术》五星教学模式探索

高职院校教学注重培养学生的实际技能,丽五星教学法正好适应了高职教学的需要。以实际项目为具体的教学情景,通过“激活旧知”、“示证新知”、“尝试应用”和“融会贯通”等环节不断强化学生的个人能力,针对《传感器与检测技术》课程的特点,理论与实践相结合,利用五星教学模式对传统的教学模式中存在的不足进行比较改进。实践证明,五星教学模式能够达到良好的教学效果,为该课程教学法探索拓宽了思路。     

电容车辆载荷检测系统中数字滤波器的设计

在电容式车辆载荷检测系统中,滤波器设计是关键技术之一,它直接关系到测量的精度.文章介绍了基于数字处理芯片TMS320VC5416的滤波方案设计.通过利用MATLAB软件进行调试仿真,设计出合适的滤波器参数,并对采样数据进行仿真输出,根据MATLAB调式好的滤波器参数编写了程序.试验结果表明,设计方案切实可行,系统的软、硬件设计达到了预期的要求.     

智能家居控制系统的设计

介绍了一种基于单片机的智能家居控制系统,该系统能检测并控制环境的温湿度,能检测燃气泄露、火灾和非法入室,同时还能进行一定的应急处理.