The approach based on linear Hall device, without increase in the cost, simple installation and the results meet to the requirement.

该方法基于线性霍尔元件，基本上不增加控制系统成本，安装简便，效果良好。

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Fireresistant Hall device and SmCo rotor is used to design position and speed sensor, and the corresponding doubling circuit and decoding circuit is designed.

采用耐高温的锁定型霍尔元件和钐钴永磁转子分别构成位置与速度传感器，并设计相应的速度信号倍频电路与位置信号译码电路。

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It can be seen from the formula: for a certain Hall device, the magnetic field B0 can be indirectly measured through measuring the Hall device if only the passing current I is constant.

从公式中可以看出，对于一定的霍尔器件，只要通过的电流i恒定不变，便可以通过霍尔器件的测量而间接测定磁场B0。

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Smaller companies will show their wares including some fun ideas, like a gaming device that prints smells in the Eureka Park hall.

FORBES: 5 Brands To Watch At Next Week's CES

John Hall, president of Annapolis-based Voxtech International, makes a similar device called the Phraselator.

NPR: Tech Solutions to Iraqi-U.S. Language Barrier

Having heard that Mr Dowson - who is originally from Airdrie in Scotland - contributes to dozens of Facebook pages and regularly addresses crowds gathered at Belfast City Hall, Judge Kelly also ordered that anyone who lives with him must also hand over any communication device they have.

BBC: Jamie Bryson