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1. 发明授权

US4597288A Barometer 失效
标题翻译：晴雨表
公开(公告)号：US4597288A
公开(公告)日：1986-07-01
申请号：US715496
申请日：1985-03-25
申请人： Hideaki Kyogoku , Fujio Tamura
发明人： Hideaki Kyogoku , Fujio Tamura
IPC分类号： G01L9/00
CPC分类号： G01L9/0022 , Y10S73/04
摘要： The present invention provides a barometer which includes a frequency control circuit connected to the input of the piezoelectric oscillator, a current-voltage converter connected to the output of the piezoelectric oscillator, a phase comparator connected to the output of the frequency control circuit and to the output of the current-voltage converter, a voltmeter connected to the current-voltage converter, a voltmeter connected to the phase comparator, a low-pass filter connected to the phase comparator, and input means for applying the output of the low-pass filter to the frequency control circuit. In the construction described above, the ambient pressure of the gas around the piezoelectric oscillator is represented by the a.c. voltage value of the piezoelectric oscillator.
摘要翻译：本发明提供一种气压计，其包括连接到压电振荡器的输入的频率控制电路，连接到压电振荡器的输出的电流 - 电压转换器，连接到频率控制电路的输出的相位比较器电流 - 电压转换器的输出，连接到电流 - 电压转换器的电压表，连接到相位比较器的电压表，连接到相位比较器的低通滤波器，以及用于施加低通滤波器的输出的输入装置到频率控制电路。在上述结构中，压电振荡器周围的气体的环境压力由a.c. 压电振荡器的电压值。

2. 发明授权

US4638664A Quartz barometer 失效
标题翻译：石英气压计
公开(公告)号：US4638664A
公开(公告)日：1987-01-27
申请号：US783249
申请日：1985-10-02
申请人： Fujio Tamura
发明人： Fujio Tamura
IPC分类号： G01L9/00 , G01L11/00
CPC分类号： G01L9/0022
摘要： In a quartz barometer untilizing the temperature dependence of the resistance of a quartz oscillator at resonance, the present invention is directed to provide a circuit which compensates for the temperature change of the resistance at resonance by connecting a temperature-dependent resistor in series with a quartz oscillator thereby enabling said quartz barometer to measure gas pressure much more accurately.
摘要翻译：在石英气压计中，使石英振荡器的电阻的温度依赖性达到共振时，本发明旨在提供一种电路，其补偿在谐振时的电阻的温度变化，其中连接温度依赖电阻器与石英振荡器，从而使所述石英气压计能够更准确地测量气体压力。

3. 发明授权

US5033306A Quartz vacuum gauge 失效
标题翻译：石英真空计
公开(公告)号：US5033306A
公开(公告)日：1991-07-23
申请号：US365758
申请日：1989-06-13
申请人： Fujio Tamura
发明人： Fujio Tamura
IPC分类号： G01L21/10 , G01L21/22
CPC分类号： G01L21/22
摘要： A vacuum gauge for measuring pressure of environmental gas includes a quartz resonator disposed in the gas, and undergoing oscillation having a resonant frequency dependent on its body temperature which is dependent on relatively low pressure and having a resonant current which is dependent on relatively high pressure. Heat source is disposed adjacent to the resonator for supplying heat to the resonator so as to maintain the body temperature thereof and resonant frequency thereof according to the pressure of environmental gas, and producing an first output signal representative of value of the pressure in relatively low pressure range. A converter converts the resonant current of resonator into a corresponding second output signal representative of value of the pressure in relatively high pressure range. A meter indicates the value of pressure according to the first and second output signals.

4. 发明授权

US4959999A Vacuum gauge of thermo-conductive type with quartz oscillator 失效
标题翻译：带石英振荡器的导热型真空计
公开(公告)号：US4959999A
公开(公告)日：1990-10-02
申请号：US311618
申请日：1989-02-15
申请人： Fujio Tamura
发明人： Fujio Tamura
IPC分类号： G01L9/00 , G01L21/22
CPC分类号： G01L21/22 , G01L9/0022
摘要： A pressure or vacuum gauge measures pressure of gas within a chamber. A quartz oscillator is disposed within the chamber for undergoing oscillation having a frequency dependent on a body temperature thereof. A constant heat source is disposed in spaced relation to or directly on the temperature-dependent quartz oscillator for heating the same to hold the body temperature thereof which is dependent on the pressure of surrounding gas. The oscillating frequency of the quartz oscillator is converted into a signal indicative of the pressure of the gas.

5. 发明授权

US4851792A Temperature-compensated oscillator circuit 失效
标题翻译：温度补偿振荡电路
公开(公告)号：US4851792A
公开(公告)日：1989-07-25
申请号：US54855
申请日：1987-05-27
申请人： Osamu Ochiai , Fujio Tamura
发明人： Osamu Ochiai , Fujio Tamura
IPC分类号： G01R19/32 , H03B5/32 , H03L1/02
CPC分类号： H03L1/022 , Y10S331/03
摘要： A temperature-compensated oscillator circuit utilizes a quartz oscillator for producing an oscillating signal having a variable oscillator frequency which fluctuates in response to ambient temperature change. A variable semiconductor capacitor having a variable capacitance is connected to the quartz oscillator for regulating the oscillating frequency thereof according to the variable capacitance. The variable semiconductor capacitor comprises a semiconductor substrate, a floating electrode disposed on and electrically insulated from the semiconductor substrate, an injection electrode formed in the semiconductor substrate for injecting a given amount of electric charge into the floating electrode to set the value of the variable capacitance, and a capacitance electrode formed in the semiconductor substrate and receptive of a bias voltage effective to adjust the set value of the variable capacitance. A control circuit detects ambient temperature change and produces a bias voltage according to the detected ambient temperature change and applies the bias voltage to the variable semiconductor capacitor to thereby enable the same to compensate the oscillating frequency for the temperature change.
摘要翻译：温度补偿振荡器电路利用石英振荡器产生具有响应于环境温度变化波动的可变振荡器频率的振荡信号。具有可变电容的可变半导体电容器连接到石英振荡器，用于根据可变电容来调节其振荡频率。可变半导体电容器包括半导体衬底，设置在半导体衬底上并与之电绝缘的浮动电极，形成在半导体衬底中的注入电极，用于将给定量的电荷注入到浮置电极中以设定可变电容的值以及形成在半导体衬底中的电容电极，并且接受有效调节可变电容的设定值的偏置电压。控制电路检测环境温度变化，并根据检测到的环境温度变化产生偏置电压，并将偏置电压施加到可变半导体电容器，从而使其能够补偿温度变化的振荡频率。

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