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1. 发明公开

EP1703262A1 System and method for regulating bridge voltage in a intermittently heated hot-wire anemometer 审中-公开
标题翻译：系统和方法，用于在间歇加热的热丝风速计桥电压的调节
公开(公告)号：EP1703262A1
公开(公告)日：2006-09-20
申请号：EP06111142.3
申请日：2006-03-14
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： HAGAN, Tobin D , BALDWIN, David J , GROSE, William E
IPC分类号： G01F1/68
CPC分类号： G01F1/696
摘要： In accordance with the teachings of the invention, a system and method for regulating bridge voltage in a discrete-time hot-wire anemometer is provided. In a particular embodiment, the hot-wire anemometer includes a bridge circuit including a hot-wire resistor, first and second input terminals, and first and second output terminals, the hot-wire resistor having a resistance dependent at least in part on an airflow past the hot-wire resistor. The hot-wire anemometer further includes a first operational amplifier coupled to the output terminals of the bridge circuit, the first operational amplifier operable to generate an output signal in response to a voltage differential across the first and second output terminals of the bridge circuit, and a second operational amplifier operable to generate an output signal in response to the output signal of the first operational amplifier and to a discontinuous time control signal. A switching mechanism cycles a supply voltage to the input terminals of the bridge circuit in response to output signal of the second operational amplifier such that the supply voltage is intermittently connected to the input terminals the bridge circuit, and an inductor coupling the switching mechanism to the first input terminal of the bridge circuit operable to low-pass filter an output voltage of the bridge circuit.
摘要翻译：在符合本发明的系统和方法用于在离散时间热线风速计调节电压桥的教导雅舞蹈设置。在特定实施例中，热线风速计包括桥电路，其包括一个热丝电阻，第一和第二输入端子，以及第一和第二输出端子，具有电阻依赖性至少部分地基于在气流中的热丝电阻经过热丝电阻器。热线式风速计进一步包括耦合到所述电桥电路的输出端的第一运算放大器，用于在所述第一运算放大器，以在输出信号产生响应于过桥电路的第一和第二输出端的电压差，和可操作第二运算放大器在输出信号响应于所述第一运算放大器的输出信号和不连续的时间控制信号产生。一种开关机构的周期检查的电源电压到电桥电路的输入端子，响应于所述第二运算放大器的输出信号并在电源电压间歇地连接到所述输入端子上的电桥电路，以及电感器耦合的切换机构的桥式电路，用于低通滤波器，以电桥电路的输出电压的第一输入端。

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