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    Warning chord sound producing apparatus including an integrated circuit
    101.
    发明授权
    Warning chord sound producing apparatus including an integrated circuit 失效
    包括集成电路的警报和声发声装置

    公开(公告)号：US4724424A

    公开(公告)日：1988-02-09

    申请号：US815825

    申请日：1986-01-02

    Applicant: Toru Nakashima ,  Haruhiko Inoue ,  Hirofumi Iwata

    Inventor： Toru Nakashima ,  Haruhiko Inoue ,  Hirofumi Iwata

    IPC: G10K1/063 ,  B06B1/02 ,  G10K9/12

    CPC classification number: B06B1/0276 ,  B06B2201/20 ,  B06B2201/55

    Abstract: A 1-bit microcomputer driven by a clock signal has first and second output ports. The signals from these output ports control first and second transistors whose output signals are supplied to step-up transformers. The output signals from these transformers drive the sounding devices constructed of piezoelectric elements to produce a chord sound. The memory of the microcomputer stores a program by which first and second square-wave pulse-train signals formed of a combination of a plurality of square wave pulses and in which each unit pulse train has a mutually different basic frequency are output from the first and second output ports.

    Abstract translation: 由时钟信号驱动的1位微型计算机具有第一和第二输出端口。 来自这些输出端口的信号控制其输出信号被提供给升压变压器的第一和第二晶体管。 来自这些变压器的输出信号驱动由压电元件构成的探测装置以产生和弦声音。 微型计算机的存储器存储由多个方波脉冲的组合形成的第一和第二方波脉冲串信号，其中每个单位脉冲串具有相互不同的基本频率的程序，从第一和第二方波输出， 第二输出端口。

    System for selectably pulsing ultrasonic transducers in a test apparatus
    102.
    发明授权
    System for selectably pulsing ultrasonic transducers in a test apparatus 失效
    用于在测试装置中可选地脉冲超声换能器的系统

    公开(公告)号：US4229978A

    公开(公告)日：1980-10-28

    申请号：US947482

    申请日：1978-10-02

    Applicant: Howard A. Sholl ,  John T. Marshall

    Inventor： Howard A. Sholl ,  John T. Marshall

    IPC: B06B1/02 ,  G01N29/24 ,  G01N29/26 ,  G01S7/52 ,  G10K11/34 ,  G01N29/00

    CPC classification number: B06B1/0215 ,  G01N29/2493 ,  G01N29/26 ,  G01S7/52004 ,  G10K11/341 ,  B06B2201/20 ,  B06B2201/70 ,  G01N2291/2623

    Abstract: A system for selectably electrically pulsing each of a plurality of ultrasonic transducers in a testing apparatus in rapid sequence to produce a pattern of ultrasonic energy transmitted into and subsequently received from a test piece comprises a plurality of transducer pulsing circuits, each connected to a different associated one of the transducers. Each pulsing circuit includes a silicon control rectifier connected to ground and a capacitor, connected between the rectifier and the associated transducer, that is dischargeable to pulse the associated tranducer. The rectifier is switchable to an "on" condition to rapidly discharge the capacitor to ground. The rectifier maintains the "on" condition until current conducted through it drops below a characteristic holding current and thereafter switches to an "off" condition. A two-state regulated voltage source is connected to the junction between the rectifier and the capacitor in each of the pulsing circuits to provide a proper charging source for the capacitor. The regulated voltage source is maintained in a high-impedance, voltage-source state designed to maintain an existing capacitor charge in spite of device leakage currents while maintaining a current level less than the rectifier holding current. Individual capacitors are isolated by a diode "and" network in the charging current path. A quick recharge, current-source state is established to recharge the capacitors at a controlled rate to a regulated voltage level. When the desired voltage is reached, the regulated voltage source reverts to its voltage-source state to maintain the voltage until the next such cycle of operation.

    Abstract translation: 一种用于可选择地电气脉冲测试装置中的多个超声波换能器中的每一个的系统，以快速顺序产生传输到测试件并随后从测试件接收的超声能量的图案，其包括多个换能器脉冲电路，每个连接到不同的相关联 其中一个换能器。 每个脉冲电路包括连接到地的硅控制整流器和连接在整流器和相关联的换能器之间的电容器，其可放电以脉冲相关联的传感器。 整流器可切换到“开”状态，以将电容器快速放电到地。 整流器保持“接通”状态，直到通过它的电流下降到特性保持电流以下，然后切换到“关闭”状态。 两个状态调节电压源连接到每个脉冲电路中的整流器和电容器之间的接点，为电容器提供适当的充电源。 调节电压源保持在高阻抗电压源状态，设计用于保持现有的电容器电荷，尽管存在器件泄漏电流，同时保持电流水平低于整流器保持电流。 单个电容器通过二极管“和”充电电流路径中的网络隔离。 建立快速充电，电流源状态，以可控速率将电容器充电至稳压电平。 当达到所需的电压时，调节电压源恢复到其电压源状态，以维持电压，直到下一个这样的操作循环。

    Control circuits for piezo electric transducers
    104.
    发明授权
    Control circuits for piezo electric transducers 失效
    压电换能器的控制电路

    公开(公告)号：US3989963A

    公开(公告)日：1976-11-02

    申请号：US581512

    申请日：1975-05-28

    Applicant: Eraldo Giaccardi

    Inventor： Eraldo Giaccardi

    IPC: B06B1/02 ,  G01S7/52 ,  H01L41/107 ,  H04R3/00 ,  H04R17/10 ,  H01L41/04

    CPC classification number: H04R3/00 ,  B06B1/0215 ,  H04R17/10 ,  B06B2201/20 ,  B06B2201/55 ,  Y10S367/903

    Abstract: A control circuit for cyclically operating one or more piezoelectric transducers to transmit and receive ultrasonic signals is disclosed. The circuit comprises a power transistor in series with an induction coil and controlled by a timing circuit to conduct for a short time during each cycle. As the power transistor cuts off a high voltage pulse is generated by the induction coil and this is fed via a zener diode as the transmission signal to the or each piezoelectric transducer across which is connected a switching circuit comprising a potential divider and a pair of opposite polarity diodes which automatically feed off the high voltage transmission signal to earth and pass low strength received signals to an amplifier.

    Abstract translation: 公开了用于循环地操作一个或多个压电换能器以发送和接收超声波信号的控制电路。 该电路包括与感应线圈串联并由定时电路控制的功率晶体管，以在每个周期期间短时间传导。 当功率晶体管截止时，感应线圈产生高电压脉冲，并且通过齐纳二极管作为传输信号馈送到压电换能器或每个压电换能器，跨压电换能器连接有包括分压器和一对相反的开关电路 极性二极管自动将高压传输信号送到地面，并将低强度接收信号传递给放大器。

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