公开(公告)号：US4068171A

公开(公告)日：1978-01-10

申请号：US721723

申请日：1976-09-09

申请人： Raymond Huguenin ,  Hubert Matthey ,  Jean Engdahl

发明人： Raymond Huguenin ,  Hubert Matthey ,  Jean Engdahl

IPC分类号： G01R23/02 ,  G04D7/12 ,  G01R23/14

CPC分类号： G01R23/02 ,  G04D7/1214

摘要： Two frequencies to be compared are applied to two inputs of a flip-flop. output of the flip-flop is fed to a low pass filter and the output of the filter is a saw tooth voltage proportional to the phase difference between the two frequencies. Differentiation of the saw tooth voltage yields a voltage proportional to the difference between the two frequencies. A threshold circuit is provided for sensing the output voltage of the filter to control a flip-flop which in turn reverses the phase of one of the frequency signals and disconnects the output of the differentiator from a capacitive storage circuit.

摘要翻译： 将要比较的两个频率应用于触发器的两个输入。 触发器的输出被馈送到低通滤波器，并且滤波器的输出是与两个频率之间的相位差成比例的锯齿电压。 锯齿电压的差异产生与两个频率之间的差成比例的电压。 提供阈值电路用于感测滤波器的输出电压以控制触发器，触发器又反转一个频率信号的相位，并将微分器的输出与电容性存储电路断开。

公开(公告)号：US4063910A

公开(公告)日：1977-12-20

申请号：US778818

申请日：1977-03-17

申请人： Raymond Huguenin ,  Hubert Matthey ,  Martial Voumard

发明人： Raymond Huguenin ,  Hubert Matthey ,  Martial Voumard

IPC分类号： H03H3/04 ,  B24B49/00 ,  B24C3/32

CPC分类号： H03H3/04 ,  Y10T29/42 ,  Y10T29/49004

摘要： Apparatus for automatically adjusting the frequency of a piezoelectric reator in the form of a bar or plate includes circuitry for applying a voltage to the resonator to cause it to resonate, measuring the frequency of the resonator continuously during a frequency adjusting cycle, continuously comparing the measured frequency with a desired frequency to obtain a difference frequency value, storing the difference frequency value at the beginning of the adjusting cycle, deriving from the difference frequency value a threshold value equal to one-half of the difference frequency value, comparing the threshold value with the frequency difference value, removing material by a sand blast from a first extremity of the resonator as long as the difference frequency value is greater than the threshold value and thereafter removing material from the other extremity of the resonator until the difference frequency value is nil.

摘要翻译： 用于自动调节棒状或板状形式的压电谐振器的频率的装置包括用于向谐振器施加电压以使其谐振的电路，在频率调整周期期间连续测量谐振器的频率，连续地比较测量的 频率以获得期望频率以获得差频值，在调整周期开始时存储差频值，从差频值导出等于差频值的一半的阈值，将阈值与 所述频率差值，只要所述差频值大于所述阈值，则从所述谐振器的第一末端通过喷砂去除材料，然后从所述谐振器的另一端除去材料，直到所述差频值为零为止。

公开(公告)号：US4062154A

公开(公告)日：1977-12-13

申请号：US721724

申请日：1976-09-09

申请人： Raymond Huguenin ,  Hubert Matthey ,  Martial Voumard

发明人： Raymond Huguenin ,  Hubert Matthey ,  Martial Voumard

IPC分类号： H03H3/04 ,  B24B1/00 ,  B24C1/00

CPC分类号： H03H3/04 ,  Y10T29/42 ,  Y10T29/49004

摘要： A process for automatically adjusting the frequency of a piezoelectric reator in the form of a bar or plate includes the steps of applying a voltage to the resonator to cause it to resonate, measuring the frequency of the resonator continuously during a frequency adjusting cycle, continuously comparing the measured frequency with a desired frequency to obtain a difference frequency value, storing the difference frequency value at the beginning of the adjusting cycle, deriving from the difference frequency value a threshold value equal to one-half of the difference frequency value, comparing the threshold value with the frequency difference value, removing material by a sand blast from a first extremity of the resonator as long as the difference frequency value is greater than the threshold value and thereafter removing material from the other extremity of the resonator until the difference frequency value is nil.

摘要翻译： 用于自动调节棒状或板状形式的压电谐振器的频率的方法包括以下步骤：向谐振器施加电压使其谐振，在频率调节周期期间连续测量谐振器的频率，连续比较 所述测量频率具有所需频率以获得差频值，将所述差频值存储在所述调整周期开始时，从所述差频值导出等于所述差频值的一半的阈值，比较所述阈值 值，具有频率差值，只要差频值大于阈值，则从谐振器的第一末端通过喷砂去除材料，然后从谐振器的另一端除去材料，直到差频值为 零。

公开(公告)号：US4084131A

公开(公告)日：1978-04-11

申请号：US729636

申请日：1976-10-05

申请人： Hubert Matthey

发明人： Hubert Matthey

IPC分类号： G01R29/22 ,  H01L41/00 ,  H01L41/22

CPC分类号： G01R29/22

摘要： The inversion temperature of a quartz piezoelectric resonator is determinedy exciting the resonator at its resonant frequency, bringing the resonator to a first temperature T.sub.h, obtaining the resonance frequency f.sub.o at the temperature T.sub.h as a standard of comparison for the subsequent measurement of resonator frequency variations, bringing the resonator to a second temperature T.sub.f and measuring the relative frequency spread (f-f.sub.o /f.sub.o) while the temperature is varying from T.sub.h to T.sub.f, detecting the maximum value of the frequency spread, and deducing the temperature at which the maximum value occurs. One of the first and second temperatures is greater and the other is less than the inversion temperature.

摘要翻译： 通过以谐振频率激励谐振器来确定石英压电谐振器的反转温度，使谐振器达到第一温度Th，获得在温度Th下的谐振频率fo作为谐振器频率变化的后续测量的比较标准 使谐振器达到第二温度Tf，并测量相对频率扩展（f-fo / fo），同时温度从Th变化到Tf，检测频率扩展的最大值，并推导出最大值 发生。 第一和第二温度之一较大，另一个小于转化温度。