基于集成霍尔传感器的报警电路的设计

霍尔集成电路有很多优点，开关输出型集成霍尔传感器的应用比较广泛。它一般由五部分构成，工作特点比较容易与数字电路相兼容。由它与数字电路构成的报警器，能检测磁铁的振荡。     

霍尔式传感器在电动车上的应用

霍尔式传感器的制造技术发展很快,集成式霍尔式传感器也品种繁多,应用日益广泛。就霍尔传感器在电动车上的应用展开讨论。     

开关型霍尔集成传感器的原理与应用

本文简单扼要地介绍了开关型霍尔集成传感器的原理和特性，概括地介绍了几种使用型式。列举了在出租车计价器等的实用方法。介绍了一种简单、实用的测试电路。     

非线性协整模型及其状态监测应用研究

基于线性协整理论的液压舵面伺服系统状态监测已经取得了积极的效果,但显示出对部分故障敏感性较弱的不足.为提高协整模型监测效力,研究采用基于神经网络的非线性协整建模方法,建立非平稳系统的非线性协整关系监测模型.仿真研究证实,该方法比线性协整监测模型具有更好的故障敏感性和可靠性.     

霍尔式位移传感器的温度特性

本文研究了霍尔式位移传感器的温度特性，在理论分析的基础上设计了温度补偿电路和相应的软件补偿程序，使温度误差小于０．１％Ｃ＾－１。误差分析的结果与温度实验相吻合，证明了方法的可行性。     

霍尔电流传感器在智能仪表电气参数测试中应用

智能仪表质量参数的测试可以通过霍尔传感器获取信号 ,文章从霍尔传感器工作原理着手 ,简单介绍霍尔电流传感器在智能仪表PCM -6电流综合保护器中的应用     

基于振动监测工业机组状态的方法

工业机组通常体积大,结构较复杂,价格高,处在生产线的关键环节,发现问题和检修较困难,以振动监测为基础的设备状态监测,通过采集机组关键环节的振动值,对时域波形进行傅里叶变换转换为波形频谱图,通过分析设备的运行频谱,可以预知设备可能存在的故障和对故障发生的可能进行预判,从而为生产安排和检修提供参考依据,进而推动生产效率的提高。     

Design of trip current monitoring system for circuit breaker condition assessment

A distributed system, which supports circuit breaker maintenance and asset management, is described. It uses a client/server architecture for propagating expert knowledge from switchgear maintenance experts directly to maintenance operatives for on-site circuit breaker condition assessment and diagnosis. Prior research in the field of distribution level circuit breaker condition monitoring has shown the trip coil of a circuit breaker yields a current profile that, when tripped, can subsequently be interpreted as an indicator of plant health. Exploiting existing circuit breaker test equipment, a centralised archive of asset condition is built from routine tests permitting experts to examine trends in the data and pass their definition of the operating conditions to personnel in the field. This provides diagnostic support to engineers in the field. The system is currently in use as the subject of a pilot study conducted by SP PowerSystems intended to improve its ongoing maintenance and asset management activities.     

光栅扭矩传感器的信号电路设计

针对水轮机主轴扭矩检测系统中的光栅扭矩传感器,设计了一种新型电路。采用ispPAC10芯片,通过器件编程的方式,实现对模拟信号的放大、整形和滤波,避免了传统模拟电路调试的麻烦。利用CPLD工作频率高的特点,进行高精度细分,结合MCU系统,完成对数据的处理。实验证明,以这种新型电路对扭转角位移进行测量时,精度高达0.001o/m,实现了扭矩的实时、高精度测量。     

电容传感器新型电容测量电路设计

提出了一种基于V／T变换的用于电容传感器的电容测量电路。它将被测微小电容变化量转换成时间信号并由单片机进行处理，电路结构简单，电路中没有影响测量稳定性和产生零点漂移的元器件，大幅度地降低了测量过程中的噪声。     

Distance measurement sensor with PIN-photodiode and bridge circuit

The presented integrated optical distance measurement sensor works on the time-of-flight principle. The distance information is obtained from the correlation of received light and the transmitted signal. The PIN-bridge circuit concept ensures suppression of background light by equally charging and discharging the capacitor within one period, while integrating the wanted signal. The advantages of the included PIN-photodiode are high bandwidth f/sub 3 dB/>1.35 GHz together with high responsivity R=0.36 A/W at 660 nm. A single distance measurement is performed in 2 ms. With averaging, an accuracy of better than 1% is achieved for distances up to 3.7 m. Effective pixel size is 250/spl times/200 /spl mu/m/sup 2/ having a fill-factor of /spl sim/16%. The sensor was manufactured in a 0.6-/spl mu/m BiCMOS process.     

Nonlinear compensation for non-contact electronic joystick with a single hall sensor

A new non-contact electronic joystick using a single hall-sensor, which detects a horizontal vector in the magnetic field, is demonstrated. Furthermore, the nonlinear characteristics between the output of the hall-sensor and the movement of the joystick bar are compensated to be linear. The dynamic horizontal vector of the magnetic flux is detected by the hall-sensor, whereas a permanent magnet is rotated with the joystick bar, which has a two-dimensional detecting area. Using the nonlinear adjustment equations, the output signals of the hall-sensor become linear, giving higher accuracy in two-dimensional movement. Through real experiments, it is shown that the single hall-sensor structure mechanism is superior to the dual-sensor structure in sensing two-dimensional motion without offset.     

雷达状态监测系统设计

为降低雷达维修成本、提高雷达保障效率,针对雷达的不同信号分别设计不同的采集方式,完成雷达实时状态监测系统,确保采集监测信息的准确性。该设计增加了数据实时处理终端系统,能够实时处理雷达状态信息,对雷达出现的故障能够做到早发现、早报警、早维修,满足保障需求。     

温度传感器S型热电偶测温电路设计

针对航天领域环境温度测量宽量程、高精度的需求,提出一种基于温度传感器进行冷端补偿的S型热电偶测量电路,该电路由S型热电偶温度传感器信号调理电路和采样量化电路两部分组成。利用温度传感器AD590的输出电流产生补偿电动势,以补偿S型热电偶冷端温度,实现其测点绝对温度的测量;通过S型热电偶输出电动势与测量温度在分段线性拟合和全量程线性拟合两种算法下的线性度比较,S型热电偶测量时的非线性误差采用分段线性拟合校正算法。对测量电路进行多次试验,结果表明,该设计可实现的温度测量范围为0～1 600℃,全温度范围测量准确度±0.2%。电路经工程应用验证,测量结果符合环境变化情况。     

Faraday current sensor with temperature monitoring

We present a novel optical current sensor based on the Faraday effect that incorporates a temperature monitoring system. The monitoring element is a temperature-dependent birefringent plate placed at the Faraday sensor head. Measurement of the plate retardation permits compensation for the temperature dependence of the Verdet constant. Validation experiments are presented and discussed.