MSP430F169 microcontroller was the core components of control and measurement function of an electromagnetic relay characteristic parameter tester. The tester also included DC power module, power amplifier module, constant current source module, keys, and digital tube display module. The tester could test the data of 943-1C-12DS electromagnetic relays including the minimum pull-in voltage, maximum release voltage, relay coil voltage rating when the pull-contact time, release time as well as the contact value of the contact resistance. The system could complete automatic measurement parameters to achieve all the basic requirements of design. And all of the test data was displayed through the 74HC573 digital tube.
摘 要：以MSP430F169单片机作为控制和测量的核心部件，辅以直流稳压电源模块、功率放大电路模块、恒流源模块、按键和数码管显示模块等组成一个电磁式继电器特性参数测试仪，完成对943-1C-12DS电磁式继电器最小吸合电压、最大释放电压、继电器线圈电压为额定值时的触点吸合时间、释放时间以及触点接触电阻值的测试，该系统能够实现成套参数自动测量，所有测试数据通过74HC573数码管进行显示。
According to the requirements of coil power supply, the paper designs one kind of constant current source based on the switching power supply.
根据线圈供电要求，本论文设计了一种基于开关技术的恒流电源。
We provide the topping technology as well as the local assembly heater and service to our China customers, at the same time we export too. The advantages and features of our products are as following:Integrated power modular design in series; Higher power and coil efficiency; Wider coil applicability; Constant 0.94 power factor at 10-100% power range; little harmonic; Standby and fast start function; Higher productivity with less coils; Advanced temperature control; Super heavy duty, less down time, easier maintenance; Flexible manufacturing etc.
我们的设备具有电热效率高；加热温度稳定温差小；串连电源谐波污染小、调功范围宽10％－100％、高功率因数0.94；模块化设计柔性生产；故障率低、设备寿命长；一体化设计占地小、效率高；线圈适应坯料直径范围比传统宽一倍；包括闭环模糊控制的多种控制方式等优点和特点。
The advantages and features of our products are as following:Integrated power modular design in series; Higher power and coil efficiency; Wider coil applicability; Constant 0.94 power factor at 10-100% power range; little armonic; Standby and fast start function; Higher productivity with less coils; Advanced temperature control; Super heavy duty, less down time, easier maintenance; Flexible manufacturing etc.
我们的设备具有电热效率高；加热温度稳定温差小；串连电源谐波污染小、调功范围宽10％－100％内保持恒定的高功率因数0.94；模块化设计柔性生产；故障率低、设备寿命长；一体化设计占地小、效率高；线圈适应坯料直径范围比传统宽一倍；包括闭环模糊控制的多种控制方式等优点和特点
In recent years, the Rhine company attaches great importance to the introduction of advanced countries in the voice coil design and manufacturing technology, from the United States, Japan and Taiwan, the introduction of fully automated production equipment and test equipment, the company works with a voice coil Taiwan automatic stainless steel pipeline 16, Winder Taiwan 30, Japan imported thermostat Ohm meter, temperature Soldering Iron, Taiwan constant temperature oven, automatic soldering machines, Kam Tin and other automatic silk thread equipment.
近年来，海韵公司十分注重引进先进国家的音圈设计和制造技术；从美国、日本、台湾等地引进全自动化生产设备和测试设备，公司音圈厂配有台湾产全自动不锈钢流水线16条、台湾产绕线机30台，日本进口恒温欧姆表，恒温烙铁，台湾产恒温烤箱，自动焊锡机，锦丝线自动镀锡机等设备。
Tension can be set at constant value for different part of coil: involutes/overhang, bend and slot section of coil.
张力在线圈的不同位置可设置为恒值：端部/外悬端，转角和直线部分。
We Mainly study the working mechanism of helical coil electromagnetic pistol to establish the dynamic equations and equivalent circuit model, and then we get the analytical solution of constant acceleration of shot.
具体研究内容如下：1、主要对螺旋线圈型电磁手枪的工作原理进行研究，建立其动力学方程和等效电路模型，进而得到了弹丸的匀加速运动解析解。
According to the vector-potential of the constant current, the vector potential of the loading current circular coil and the series expression formula of the magnetic field are derived.
根据稳恒电流的矢势，导出载流圆形线圈的矢势和磁场的级数表达式。
In this paper, the test of force constant of voice coil motor and its test principle along with methods are mainly researched. The design and form of microcontroller-based test system are given.
主要研究音圈电机力常数的测试，讨论其测试原理和方法，给出了基于8031单片机的测试系统的构成和设计。
Design of a Microcontroller-based Tester of Force Constant of Voice Coil Motor
基于单片机的音圈电机力（矩）常数测试仪的设计
A large power combined compensated driving linear servo unit based on the principle of voice coil motor is presented. Its force constant, maximum driving force and maximum driving current are 82 N/A, 820 N and 10A respectively.
依据动圈电动机的基本原理，研究开发了一种大推力复合补偿驱动的直线伺服单元，其推力常数为82N／A，最大驱动电流为10A，最大推力820N。
The voltage pulse induced by a bar magnet as it moves at constant velocity through the axis of a circular coil is analyzed.
分析了条形磁铁沿线圈轴向匀速通过线圈时感应引起的电压脉冲。
The text not only analyses the relations between two usual ways that calculate constant magnetic field energy in general physics books, but also gives the other way to calculate magnetic field energy which distribute in closing current with the formula about magnetic energy in electric current coil.
本文分析了普物教科书中稳恒磁场能量常用的两种计算方法之间的关系，给出了闭合体分布电流磁场磁能的另一种计算方法。
It was devoted to the relative damping measurement for overdamped geophone with a moving coil of constant velocity.
对动圈式恒速度型过阻尼地震检波器相对阻尼系数的测量方法进行了研究。
The phase variance and error caused by frequency change, which exist in the experiment of measuring dynamic Young modulus by resonance method, are analyzed. By connecting coil and AC constant current source in series, the experiment device is improved.
指出了共振法测定动态杨氏模量实验中存在相位不一致且频率变化引起的误差，提出了在输入端串接补偿线圈和交流恒流源的改进方法。
For electromagnetic induction coil in signal sampling circuit, the time constant of integrating circuit how to affect voltage deviation of current to be measured in integrating circuit was studied, the optional time constant for required voltage deviation was also given.
研究了电磁感应线圈在信号采集电路中，积分电路的时间常数大小对被测电流在积分电路上的电压误差的影响，并根据所要求的电压误差给出了可选用的时间常数。
Working principle of the control circuit is presented, expressions for calculating constant current value of its coil and constant current surplus quantity are derived and calculating expressions of clamping voltage and current break protecting time of the circuit are also given.
介绍了该控制电路的工作原理，导出了其线圈恒流值计算式和恒流裕量计算式，并给出了该电路的钳位电压和停车断电保护时间计算式。
It focuses on parameter measurement for constant acceleration overdamped coil type geophones.
研究恒加速度过阻尼动圈式地震检波器参数的测量方法。
On the basis of the stable state model, it has analyzed the adjusting method of the fan coil's cooling power (in summer), and got the adjusting scope of every method, also compared with that regulated by indoor constant temperature instruments.
在稳态模型的基础上，对风机盘管的冷量（夏季）调节方式进行了模拟分析，得出了各种调节方式的调节范围，并与室内恒温器设定的调节范围进行了比较。
In addition, under the condition of the magnetic field is constant, the increase of pressure weakens the role of magnetic field, Finally, the influence of coil radius on the plasma discharge is discussed.
另外，在会切磁场大小不变的情况下，压强的增加又对磁场的影响起到减弱的作用。最后，我们讨论了线圈半径对等离子体放电的影响。