公开(公告)号：US4689515A

公开(公告)日：1987-08-25

申请号：US910959

申请日：1986-09-24

Applicant: Gerald Benndorf ,  Klaus Van der Linden

Inventor： Gerald Benndorf ,  Klaus Van der Linden

IPC: B05B12/00 ,  B05B17/06 ,  B06B1/02 ,  B06B1/06 ,  H01L41/08 ,  B05B3/14

CPC classification number: B05B17/0623 ,  B05B12/08 ,  B05B17/063 ,  B05B17/0669 ,  B06B1/0253 ,  B06B2201/55 ,  B06B2201/77

Abstract: In an ultrasonic frequency generating assembly including a frequency generator coupled to a transducer through an output stage, a current measuring circuit is coupled to the output stage for sampling the current therethrough during each frequency burst upon the passage of a predetermined time interval following the onset of the respective frequency burst. The current value measured during a frequency burst is compared with a measured current value from an immediately preceding burst, the frequency output of the frequency generator being modified in accordance with the results of the comparison. The compared current values are stored in respective memories, the most recently measured current value being transferred from one memory to the other upon the termination of the comparison. A new current value is then loaded into the first memory.

Abstract translation: 在包括通过输出级耦合到换能器的频率发生器的超声频率发生组件中，电流测量电路耦合到输出级，用于在每个频率突发之后，在经过预定的时间间隔之后对其进行采样， 相应的频率突发。 在频率突发期间测量的当前值与来自紧接在前的脉冲串的测量的电流值进行比较，频率发生器的频率输出根据比较的结果被修改。 将比较的电流值存储在相应的存储器中，最近测量的电流值在比较结束时从一个存储器传送到另一个存储器。 然后将新的当前值加载到第一个存储器中。

公开(公告)号：US4554477A

公开(公告)日：1985-11-19

申请号：US554908

申请日：1983-11-25

Applicant: Henry K. Ratcliff

Inventor： Henry K. Ratcliff

IPC: B06B1/02 ,  H01L41/08

CPC classification number: B06B1/0284 ,  B06B2201/55 ,  B06B2201/58 ,  B06B2201/71

Abstract: A circuit for driving a plurality of ultrasonic transducers uses an oscillator drive means, first means responsive to the current supplied to the transducers is fed back to vary the oscillator frequency to maintain the transducer current at a maximum level, and second means, independent of the first means, are provided to cyclically sweep between upper and lower limits the oscillator frequency determined by the first means. This assures that each transducer experience resonance at least once each sweep.

Abstract translation: 用于驱动多个超声换能器的电路使用振荡器驱动装置，响应于提供给换能器的电流的第一装置被反馈以改变振荡器频率以将换能器电流保持在最大电平，第二装置独立于 第一装置被提供以在上限和下限之间循环扫描由第一装置确定的振荡器频率。 这确保每个传感器每次扫描至少经历一次共振。

公开(公告)号：US4318062A

公开(公告)日：1982-03-02

申请号：US61983

申请日：1979-07-30

Applicant: Sadao Mitsui ,  Minoru Takahashi ,  Keiichi Watanabe

Inventor： Sadao Mitsui ,  Minoru Takahashi ,  Keiichi Watanabe

IPC: B05B17/06 ,  B06B1/02 ,  B06B1/06 ,  H03B5/04 ,  H03B5/36 ,  H03L5/02

CPC classification number: B05B17/0607 ,  B06B1/0253 ,  B06B2201/55 ,  B06B2201/77

Abstract: Voltage or current or power supplied to the piezo-electric vibrator of an ultrasonic nebulizer is sensed and used as negative feedback to stabilize oscillation in the oscillator driving circuit.

Abstract translation: 检测提供给超声波雾化器的压电振动器的电压或电流或电力，并将其用作负反馈以稳定振荡器驱动电路中的振荡。

公开(公告)号：US4275388A

公开(公告)日：1981-06-23

申请号：US110730

申请日：1980-01-09

Applicant: Richard E. Hornung

Inventor： Richard E. Hornung

IPC: B06B1/02 ,  G08B3/10 ,  G08B3/00 ,  H01L41/04 ,  H04R17/00

CPC classification number: B06B1/0261 ,  G08B3/10 ,  A61M2205/186 ,  B06B2201/40 ,  B06B2201/55

Abstract: A piezoelectric transducer frequency self-calibration system interrogates the transducer by driving it with various frequencies within a specified range while monitoring the transducer output power level. Two threshold frequency points are identified at which the output power level is at a predetermined threshold level less than the expected maximum output level, and the average of these two threshold frequencies is taken to be the optimum frequency.

Abstract translation: 压电换能器频率自校准系统在监测换能器输出功率水平的同时，通过在指定范围内以各种频率驱动换能器来询问换能器。 识别两个阈值频率点，其中输出功率电平处于小于预期最大输出电平的预定阈值电平，并且将这两个阈值频率的平均值视为最佳频率。

公开(公告)号：US4256987A

公开(公告)日：1981-03-17

申请号：US32875

申请日：1979-04-24

Applicant: Akihiro Takeuchi ,  Kiyokazu Asai

Inventor： Akihiro Takeuchi ,  Kiyokazu Asai

IPC: B06B1/06 ,  B06B1/02 ,  H01L41/08

CPC classification number: B06B1/0253 ,  B06B2201/55 ,  B06B2201/77

Abstract: An electrical circuit for driving a piezoelectric transducer includes a DC electric source, a constant current circuit, connected to the DC electric source for processing a DC signal from the DC electric source and supplying a constant output current having a predetermined constant value, and an oscillation circuit connected to the constant current circuit for driving the piezoelectric transducer with a resonance frequency and with a constant current. The electrical circuit approximately drives the piezoelectric transducer with a constant current by supplying the constant current to the oscillation circuit.

Abstract translation: 用于驱动压电换能器的电路包括直流电源，恒流电路，连接到直流电源，用于处理来自直流电源的直流信号，并提供具有预定常数值的恒定输出电流和振荡 连接到用于以谐振频率和恒定电流驱动压电换能器的恒流电路。 通过向振荡电路提供恒定电流，电路大致以恒定电流驱动压电换能器。

公开(公告)号：US4139842A

公开(公告)日：1979-02-13

申请号：US787461

申请日：1977-04-14

Applicant: Nobuhiko Fujita ,  Hiroshi Saito

Inventor： Nobuhiko Fujita ,  Hiroshi Saito

IPC: B06B1/02 ,  G08B3/10 ,  H03B5/32 ,  H03B5/30 ,  G08B3/00

CPC classification number: G08B3/10 ,  B06B1/0261 ,  H03B5/323 ,  B06B2201/55

Abstract: The present invention is an audible alarm unit including a coil, a resistor, an NPN transistor, and a piezoelectric transducer having first and second electrodes and a feedback electrode. The collector and emitter of the transistor and the coil are connected in series between positive and negative terminals of a direct current power source. The base of the transistor is connected to the collector through the resistor. The first and second electrodes of the piezoelectric transducer are connected either to both ends of the coil or to the collector and emitter of the transistor, respectively. The feedback electrode of the piezoelectric transducer is connected to the base of the transistor.

Abstract translation: 本发明是一种包括线圈，电阻器，NPN晶体管和具有第一和第二电极和反馈电极的压电换能器的声音警报单元。 晶体管和线圈的集电极和发射极串联连接在直流电源的正极和负极之间。 晶体管的基极通过电阻连接到集电极。 压电换能器的第一和第二电极分别连接到线圈的两端或晶体管的集电极和发射极。 压电换能器的反馈电极连接到晶体管的基极。

公开(公告)号：US4113809A

公开(公告)日：1978-09-12

申请号：US784044

申请日：1977-04-04

Applicant: Raymond L. Abair ,  Stanley J. Kulish, Jr.

Inventor： Raymond L. Abair ,  Stanley J. Kulish, Jr.

IPC: B05B17/06 ,  A61M11/00 ,  A61M15/00 ,  B06B1/02 ,  B06B1/06

CPC classification number: B06B1/0223 ,  A61M15/0015 ,  A61M15/0085 ,  B06B2201/40 ,  B06B2201/55 ,  B06B2201/76 ,  B06B2201/77 ,  Y10S261/45 ,  Y10S261/65 ,  Y10S261/88

Abstract: An improved ultrasonic nebulizer for administering a medicament aerosol to a patient. Output from an oscillator is connected through a series inductor to a transducer adjacent a reservoir which generates aerosol from the medicament. The inductor is tuned for series resonance with the bulk capacitance of the transducer. An impedance change in the transducer when liquid is removed or consumed from the reservoir reduces the power delivered to the transducer and prevents transducer damage.

Abstract translation: 一种用于向患者施用药物气溶胶的改进的超声雾化器。 来自振荡器的输出通过串联电感器连接到与从药物产生气溶胶的储存器相邻的换能器。 电感器被调谐以与传感器的体电容串联谐振。 当液体从储存器中取出或消耗时，换能器中的阻抗变化会降低输送到换能器的功率，并防止换能器损坏。

公开(公告)号：US4004165A

公开(公告)日：1977-01-18

申请号：US593212

申请日：1975-07-07

Applicant: Ivo Leo Bredael ,  Fulvio Laghi

Inventor： Ivo Leo Bredael ,  Fulvio Laghi

IPC: H04R17/00 ,  B06B1/02 ,  G01N29/24 ,  G01S7/52 ,  H01L41/04

CPC classification number: G01N29/2437 ,  B06B1/0215 ,  G01S7/52003 ,  G01S7/52046 ,  B06B2201/55

Abstract: A piezo electric signal generator and receiver assembly for a flaw detector has a generator adjacent to the crystal transducer and a cable connection to a distant point where a d.c. power supply and the indicator is located. The same cable is used for supplying power to the generator and for conveying to the indicator signals corresponding to both acoustic transmitted pulses and reflected returns. For this purpose a charging voltage is applied to a series circuit comprising the capacitor and crystal and this circuit is discharged by a switch connected to the capacitor at the input end of the charging circuit. Both transmitted and received signals are fed in the same direction through the cable and are therefore subjected to the same delays.

Abstract translation: 用于瑕疵检测器的压电信号发生器和接收器组件具有与晶体换能器相邻的发生器，以及与远程点的电缆连接。 电源和指示灯位于。 同样的电缆用于向发电机供电，并将其传送到对应于声发射脉冲和反射回波的指示信号。 为此，将充电电压施加到包括电容器和晶体的串联电路，并且该电路通过在充电电路的输入端处连接到电容器的开关放电。 发送和接收信号都通过电缆沿相同的方向进给，因此受到相同的延迟。

公开(公告)号：US3904896A

公开(公告)日：1975-09-09

申请号：US26993572

申请日：1972-07-10

Applicant: SIEMENS AG

Inventor： GUNTERSDORFER MAX

IPC: B05B17/06 ,  B06B1/02 ,  B06B1/06 ,  H01L41/09 ,  H01V7/00

CPC classification number: B05B17/063 ,  B05B17/0623 ,  B05B17/0684 ,  B06B1/0261 ,  B06B1/06 ,  B06B2201/55

Abstract: A piezoelectric oscillator system includes a coupling oscillator having a piezoelectric transducer and a plate for vibration in a bending mode. The coupling oscillator is mechanically connected to a second plate which is also caused to vibrate in a bending mode upon energization of the piezoelectric transducer by an AC voltage. The second-mentioned plate may carry a second piezoelectric transducer for generating an electrical output signal. The system includes means for effecting self generation of the AC voltage through the provision of a tap electrode associated with the piezoelectric transducer for taking off a feedback control signal for a transistor switching circuit which may be constructed to provide an AC rectangular waveform.

Abstract translation: 压电振荡器系统包括具有压电换能器和弯曲模式振动板的耦合振荡器。 耦合振荡器机械地连接到第二板，该第二板在通过AC电压激励压电换能器时也被引起以弯曲模式振动。 第二提及的板可以携带用于产生电输出信号的第二压电换能器。 该系统包括用于通过提供与压电换能器相关联的抽头电极来实现AC电压的自身生成的装置，用于去除用于提供AC矩形波形的晶体管开关电路的反馈控制信号。

公开(公告)号：US3872470A

公开(公告)日：1975-03-18

申请号：US35214573

申请日：1973-04-18

Applicant: AIRCO INC

Inventor： HOERZ RICHARD D ,  PROPP DONALD J

IPC: B06B1/02 ,  G08B3/10 ,  G10K9/122 ,  G08B19/00

CPC classification number: G10K9/122 ,  B06B2201/55 ,  G08B3/10

Abstract: A ceramic crystal transducer is connected to a direct current supply in series with a pair of transistors. A pair of independent multivibrator oscillators are connected, each controlling one of the transistors. Each oscillator establishes a rectangular wave and is provided with a continuously adjustable resistor for controlling the output frequency of the corresponding oscillator. The one oscillator is constructed to produce a frequency and a voltage to excite the crystal at the order of the natural resonant frequency and to thereby produce an audio output signal. The second multivibrator oscillator selectively controls the second transistor to control the on/off or pulsing rate of the tone related audible signal. The crystal is pulsed at the output rate of the tone oscillator and vibrates at the fundamental frequency of the rectangular wave as well as harmonics to either side of such fundamental frequency to produce a full and pleasant sound. Variation of the repetition rate of the output signal of the tone generator to either side of the natural resonant frequency of the crystal correspondingly varies the pitch and intensity of the emitted sound to distinguish adjacent alarms. The pulse rate oscillator permits further distinction by adjustment of the signal duty cycle.

Abstract translation: 陶瓷晶体换能器与一对晶体管串联连接到直流电源。 一对独立的多谐振荡器连接，每个控制一个晶体管。 每个振荡器建立一个矩形波，并提供一个连续可调电阻，用于控制相应振荡器的输出频率。 一个振荡器被构造成产生频率和电压以按照固有谐振频率的顺序激发晶体，从而产生音频输出信号。 第二多谐振荡器选择性地控制第二晶体管以控制音调相关的可听信号的开/关速率。 晶体以音调振荡器的输出速率脉冲，并以矩形波的基频振荡，并且在这种基频的任一侧谐波，产生完整和愉悦的声音。 音调发生器的输出信号与晶体的固有共振频率的任一侧的重复频率的变化相应地改变发射声音的音调和强度以区分相邻的警报。 脉冲振荡器允许通过调整信号占空比来进一步区分。