共查询到20条相似文献,搜索用时 175 毫秒
1.
2.
3.
4.
5.
6.
弹载系统的一体化、模块化已成为趋势,据此提出利用DSP来实现精确制导组件(Precision Guidance Kit, PGK)一体化系统的控制,完成导弹的制导和控制任务,从而提高弹载系统的可靠性和导弹的作战能力;叙述了PGK控制系统中硬件与软件的设计过程,包括对控制模块、GPS接收机、地磁测量模块、无线装定模块等的设计和功能介绍,以及对软件工作流程和软件模块进行简要介绍;通过发射安装本PGK系统的修正弹进行飞行试验,GPS模块与地磁测量模块的测试结果表明该系统可以基本实现模块功能。 相似文献
7.
8.
黄国青 《计算机测量与控制》1995,(1)
本文介绍了一种由捷联式地磁传感器和微处理机构成的磁方位测量系统。这种磁方位测量系统不仅结构简单,而且可避免常用磁罗盘系统在运载体机动运行时将出现的一些测量误差。同时本系统采用微处理机作为解算装置,可采用软件技术对测量元件本身的误差和各种系统误差进行补偿。使该系统能做在线实时磁方位精确计算。 相似文献
9.
地磁环境下弱磁信号的检测要求地磁传感器具有灵敏度高、工作范围宽的特点,非晶丝在高频交流激励下具有阻抗变化率高的特点,宜于用来作地磁传感器.但非晶丝线性工作区较短,不能完全覆盖地磁场范围,通过采用数字补偿技术可以补偿大部分地磁场,使传感器工作于非晶丝的线性区,提高了传感器的灵敏度,扩展了传感器的工作范围.通过测试,采用数字补偿技术的巨磁阻传感器灵敏度为71. 133μV/nT,工作于-61 750. 8~73 774. 8 nT,与被测磁场的最大误差为2. 45 nT. 相似文献
10.
《自动化仪表》2019,(11)
铁路地面标志传感器采用电涡流原理,动态探测轨道上特殊金属构件的位置。为了满足新一代轨检系统的性能要求,对传感器原理及存在问题进行分析。通过对传感器内部结构及信号处理方法进行研究,研制了基于数字微处理系统的新型地面标志传感器。新型传感器探测线圈采用平衡式结构,补偿了线圈自身的温度漂移;以频率源电路取代谐振电路,提高了输出波形的稳定性;检测数据通过实时现场总线方式传输到轨检系统平台,改善了数据传输的实时性和可靠性。新型传感器经过调试和封装后,在试验室和线路进行了测试,并在路局轨道检查车上进行了应用。该新型传感器稳定性和可靠性高、结构简单、易于实现,满足了新型轨检系统的需求。 相似文献
11.
研究了两种结构的谐振式磁场传感器,检测在磁场作用下梁的振动幅度,来实现磁场的测量。首先介绍了传感器的工作原理,并用振动理论对传感器的受力及响应进行了分析,接着用有限元软件建立结构模型,对振动幅度进行了仿真。该MEMS磁场传感器采用标准的CMOS工艺加上后处理来实现。最后用多普勒仪对传感器的振动幅度进行测试,实验结果与理论分析一致,并对两种传感器性能进行比较。所研究的两种传感器结构简单,测试方便,可用于对mT级的磁场进行测试。 相似文献
12.
Microelectronic chip-based systems are available for a wide variety of applications. Many of these systems rely on NON-INTEGRATED optical detection schemes to collect data from the chips. A magnetoresistive detection format, however, can be completely integrated. This paper presents some basic concepts for optimizing micron-sized magnetoresistive sensors for single nucleotide polymorphism (SNP) analysis and DNA diagnostics. Magnetoresistive sensors are nano-fabricated thin film resistors whose resistance changes as a function of magnetic field. The magnetic DNA assay replaces the EXTERNAL optical reader apparatus with an INTEGRATED magnetoresistive sensor at each “pixel” of the array. The EXTERNAL light source can be replaced by an INTEGRATED magnetic field generation strap, or by a simple external coil. Magnetoresistive pixel sizes could presently be ˜ 3 microns on a side, and decrease to ˜ 100 nm with technological improvements. It is shown that, taking reasonable values for critical parameters, a signal to noise ratio of 10,000 : 1 is achievable using 10 nm paramagnetic beads as the assay label. As early demonstrations of the feasibility of this system, data have been collected using NVE's magnetoresistive sensors (non-optimized) to easily detect single micron-sized magnetic beads. Presently NVE is working on 1 million bit arrays of magnetoresistive sensors which are being fabricated into magnetoresistive random access memory (MRAM) chips. These arrays have many similarities to what is required for the magnetoresistive DNA assay including sub-micron bit size and single bit addressability. 相似文献
13.
14.
介绍了一种以磁阻传感器为磁敏元件,以单片机为控制核心的高精度转速测量方法。论述了测量系统工作原理、各硬件部分功能。传感器探头由激励线圈和磁阻传感器构成,输入的电流在激励线圈周围产生交变磁场,当齿轮转动时,激励线圈的磁场发生变化,位于线圈中央的磁阻传感器将其转变成电信号,在单片机的控制下进行放大处理和显示。该转速传感器具有准确度高、测量范围宽、安装调试方便等优点。 相似文献
15.
Mutsumi Kimura 《Journal of the Society for Information Display》2019,27(12):741-756
Thin‐film devices are widely utilized for flat‐panel displays, and the essential advantages of the thin‐film devices are generally large‐area production, various‐material substrate, layered structure, etc. Appropriate applications are flat‐panel displays, and other applications where the abovementioned advantages are available and the disadvantages are acceptable are sensor applications. Moreover, if the sensor devices can be made by thin‐film devices that have been already utilized for flat‐panel displays, they can be made without additional cost. Therefore, thin‐film devices are again promising for sensor applications especially for interactive displays. We are investigating sensor applications of thin‐film devices. Particular in this journal paper, we review sensor applications of thin‐film devices originating in display technologies. The various sensors are visible‐light sensor, infrared‐light sensor, temperature sensor, magnetic‐field sensor, etc. Many research results from many research organizations as well as our research laboratory are introduced. 相似文献
16.
对NiFe/SiO_2/NiFe薄膜可消除巴克豪生噪声及其对磁场梯度敏感的原理进行了分析,作为薄膜磁头材料进行了读取垂直磁记录信号实验,结果表明,这种薄膜是一种具有高分辨率的、低噪声的磁电阻磁头材料。 相似文献
17.
根据亚磁场生物学实验要求,利用Silicon Labs的C8051F005微处理器设计了一种轴向亚磁场产生和测量系统.基于亥姆霍兹线圈产生磁场的基本原理设计了一种新的磁场产生结构,采用MAX038产生交变磁场的硬件电路,使用磁阻磁强计对磁场进行精确测量,用VC6.0设计了上位机软件,图形化显示从磁阻磁强计传输过来的数据.实测表明,新结构产生磁场的均匀性要比亥姆霍兹线圈产生的磁场均匀性好,磁场均匀范围宽.亚磁场随电流的变化呈线性变化,具有很好的可控性,可通过简单设置控制交流磁场的频率. 相似文献
18.
19.
分析偏磁式消弧线圈补偿装置的作用及工作原理,介绍偏磁式消弧线圈补偿装置在安钢某220kV变电站10kV系统的具体应用. 相似文献