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1.发明申请
公开(公告)号：WO0209271A3
公开(公告)日：2002-05-10
申请号：PCT/US0123249
申请日：2001-07-24
Applicant: HAMILTON SUNDSTRAND CORP
Inventor： PENNELL JOHN D
Abstract: An AC-to-DC converter obtains phase and amplitude signal information from a displacement transducer that is excited by an AC excitation signal and provides an AC sensor signal indicative of transducer position. The converter includes a first rectifier circuit that receives and sums the AC excitation signal and the AC sensor signal, and rectifies the sum to provide a rectified summed excitation and input signal indicative thereof. A second rectifier circuit receives and rectifies the AC excitation signal, and provides a rectified excitation signal indicative thereof. A summing circuit computes the difference between the rectified summed excitation and input signal and the rectified excitation signal, and provides a signed DC signal indicative of displacement transducer position. Advantageously, the AC-to-DC converter of the present invention performs summing and difference functions directly and provides a signed DC signal representative of the AC amplitude and phase input of the transducer output, thus eliminating the need for an analog-to-digital converter (ADC) and the support of an associated processor.
Abstract translation: AC-DC转换器从由AC激励信号激励的位移传感器获得相位和振幅信号信息，并提供指示换能器位置的AC传感器信号。 该转换器包括第一整流器电路，其接收和加和AC激励信号和AC传感器信号，并且对该和进行整流以提供指示其的经整流的求和激励和输入信号。 第二整流电路接收并整流AC激励信号，并提供指示其的整流的激励信号。 求和电路计算整流的求和激励和输入信号与整流的激励信号之间的差值，并提供一个表示位移传感器位置的有符号直流信号。 有利地，本发明的AC-DC转换器直接执行求和和差分函数，并提供表示换能器输出的AC振幅和相位输入的带符号DC信号，从而不需要模数转换器 （ADC）和相关处理器的支持。
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公开(公告)号：AU7712801A
公开(公告)日：2002-02-05
申请号：AU7712801
申请日：2001-07-24
Applicant: HAMILTON SUNDSTRAND CORP
Inventor： PENNELL JOHN D
Abstract: An AC-to-DC converter obtains phase and amplitude signal information from a displacement transducer that is excited by an AC excitation signal and provides an AC sensor signal indicative of transducer position. The converter includes a first rectifier circuit that receives and sums the AC excitation signal and the AC sensor signal, and rectifies the sum to provide a rectified summed excitation and input signal indicative thereof. A second rectifier circuit receives and rectifies the AC excitation signal, and provides a rectified excitation signal indicative thereof. A summing circuit computes the difference between the rectified summed excitation and input signal and the rectified excitation signal, and provides a signed DC signal indicative of displacement transducer position. Advantageously, the AC-to-DC converter of the present invention performs summing and difference functions directly and provides a signed DC signal representative of the AC amplitude and phase input of the transducer output, thus eliminating the need for an analog-to-digital converter (ADC) and the support of an associated processor.
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公开(公告)号：GB2493831A
公开(公告)日：2013-02-20
申请号：GB201214212
申请日：2012-08-09
Applicant: HAMILTON SUNDSTRAND CORP
Inventor： PENNELL JOHN D
Abstract: A pulse displacement system comprises: a sensor, generating an analog waveform 105 indicative of an angular displacement of a reference wheel from a displacement wheel; a comparator 110, generating a pulse waveform; a flip flop 205, generating a duty cycle waveform; a first counter 215, accumulating a first count of high states of the duty cycle waveform; a second counter 220, accumulating a second count of low states; and a processor, determining a first average for the first count and a second average for the second count, and calculating a duty cycle of the pulse waveform as a function of these averages, where the first count includes an additional high state over the low state (see 310 and 315 in Figure 3). A method for determining a duty cycle in such a system is also provided. The system may map the calculated duty cycle to a torque value, and may be used in a control system for a helicopter rotor.
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公开(公告)号：GB2493831B
公开(公告)日：2014-01-15
申请号：GB201214212
申请日：2012-08-09
Applicant: HAMILTON SUNDSTRAND CORP
Inventor： PENNELL JOHN D
Abstract: A method for determining a duty cycle in a pulse displacement system, includes generating an analog waveform indicative of an angular displacement of a reference wheel from a wheel; generating a pulse waveform of the analog waveform; generating a duty cycle waveform responsive to the generating of the pulse waveform; accumulating a first count of high states of the duty cycle waveform; accumulating a second count of low states of the duty cycle waveform; determining a first average for the first count and a second average for the second count; and calculating a duty cycle of the pulse waveform as a function of the first average and the second average. Also, the first count includes an additional high state over the low state.
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