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    • 1. 发明授权
    • Methods and apparatuses for selectively limiting undesired radiation
    • 用于选择性地限制不需要的辐射的方法和装置
    • US07095026B2
    • 2006-08-22
    • US10703136
    • 2003-11-06
    • John W. DevittMark E. GreinerJeffrey J. VoelkerDavid R. Wade
    • John W. DevittMark E. GreinerJeffrey J. VoelkerDavid R. Wade
    • G01J5/00
    • G01J5/06G01J1/04G01J1/0407G01J1/0414G01J1/0418G01J1/0488G01J1/42G01J2001/0276G02F1/0126G02F2203/11G02F2203/52
    • An apparatus for selectively limiting undesired radiation from a scene which, in one embodiment, includes an optic that is operative to attenuate radiation by selectively losing transparency in response to radiation within a first wavelength band from a source. The loss of transparency affects the passage through the optic of radiation within a second wavelength band from that source. The optic can be positioned between a sensor and the scene such that the sensor is configured to receive radiation from the scene through the optic. In one embodiment, an optical limiter includes a plurality of such optics, wherein the optical limiter is configured to facilitate transmission of light corresponding to a scene, and wherein each optic is configured to receive a respective portion of the light corresponding to a respective portion of the scene. A light detector assembly and a method of limiting light energy are also included.
    • 一种用于选择性地限制来自场景的不需要的辐射的装置,在一个实施例中,该光学器件包括可操作地通过响应于来自源的第一波长带内的辐射选择性地损失透明度来衰减辐射的光学器件。 透明度的损失影响到来自该源的第二波长带内的辐射光通过。 光学元件可以位于传感器和场景之间,使得传感器被配置成通过光学器件从场景接收辐射。 在一个实施例中,光学限制器包括多个这样的光学器件,其中所述光学限制器被配置为促进对应于场景的光的透射,并且其中每个光学器件被配置为接收对应于相应部分的光的相应部分 现场。 还包括光检测器组件和限制光能的方法。
    • 2. 发明授权
    • Method and apparatus for optically sensing the position and velocity of
piano keys
    • 用于光学感测钢琴琴键的位置和速度的方法和装置
    • US5567902A
    • 1996-10-22
    • US369882
    • 1995-01-06
    • Thomas E. KimbleDavid R. Wade
    • Thomas E. KimbleDavid R. Wade
    • G10H1/055G10H1/34H03K17/96G10H1/02H03K17/94
    • H03K17/9631G10H1/0553G10H1/344Y10S84/07
    • An electronic keyboard musical instrument is provided having optical emitters and detectors both positioned beneath each of the instrument's keys, whereby optical energy is emitted upon the bottom reflective surface of the key and the reflected light is detected. The distance between the optoelectronic sensor and the bottom of the key is detected by the light detector which produces an analog output signal and, by measuring the time between a first and second threshold crossing, the key's velocity can be determined. The two thresholds are preferably chosen to measure a rising voltage as the key is depressed, and the threshold values are preferably chosen at 50% of key travel and 75% of key travel. By use of these thresholds, a relatively clean and useful waveform is available at both threshold crossings, particularly since the mechanical movement of the key has nearly reached its terminal velocity. Electronics in the keyboard instrument sequentially scan each of the output voltages produced by their corresponding light detectors so that a single microprocessor can measure all of the key position values. A single set of threshold voltages can be utilized for all of the keys of the keyboard instrument, if desired, or each of the keys can have its own individual threshold values depending upon the calibration values for its zero and span conditions. The time interval between threshold crossings can be determined, which in turn is used to determine the velocity of each key as it is being depressed. Once the velocity is known, the volume for that key's particular musical tone can be controlled by a sound engine, as well as its other characteristics, such as timbre, attack, and envelope.
    • 提供了一种电子键盘乐器,其具有放置在每个乐器键下方的光发射器和检测器,由此在键的底部反射表面上发射光能并检测反射光。 光电传感器与键的底部之间的距离由产生模拟输出信号的光检测器检测,并且通过测量第一和第二阈值交叉之间的时间,可以确定键的速度。 优选地选择两个阈值以在键被按下时测量上升电压,并且阈值优选地选择在键移动的50%和键行程的75%。 通过使用这些阈值,在两个阈值交叉处都可以获得相对干净和有用的波形,特别是因为钥匙的机械运动几乎达到其终端速度。 键盘仪器中的电子仪器顺序地扫描由其对应的光检测器产生的每个输出电压,使得单个微处理器可以测量所有键位置值。 如果需要,可以对键盘乐器的所有键使用单组阈值电压,或者每个键可以根据其零和跨度条件的校准值具有其各自的单独阈值。 可以确定阈值交叉点之间的时间间隔,而后者又用于确定每个键被按下时的速度。 一旦知道速度,该键的特定乐音的音量可以由声音引擎以及其它特征(如音色,攻击和包络)来控制。
    • 3. 发明授权
    • Capture combination action system for electronic organs
    • US4296667A
    • 1981-10-27
    • US121591
    • 1980-02-14
    • David R. WadeWalter Munch
    • David R. WadeWalter Munch
    • G10H1/24G09B15/00G10B3/10
    • G06K13/0825G10H1/24
    • A microprocessor controlled electronic capture combination action system for use in an electronic organ for selecting a predetermined combination of stops to define the organ voicing. The system includes a plurality of stop tabs for setting and resetting the stops, a plurality of pistons for setting a desired combination of stops to a predetermined condition, a random access memory for storing data associated with a selected combination of stops, a read only memory containing a permanently stored operating program incorporating a plurality of operating instructions, an indicator light associated with each of the stop tabs and a microprocessor responsive to the operating instructions. The stop tab and pistons are continually and sequentially scanned to detect the contact closures. Actuated stop tabs cause the associated stops to be selected and the indicator lights illuminated. Information corresponding to a selected combination of stops for a selected one of the pistons is stored in the random access memory and may be recalled at will by closing the appropriate piston. The recalled data is used to select the combination of stops and illuminate the associated indicator lights.The system also includes a manually operable crescendo shoe which may be used to actuate a plurality of predetermined combinations of the stops in response to designated positions of the shoe. In a preferred embodiment, a crescendo circuit is used to cause a delayed interrupt signal to the operating program to provide a count which is compared against stored values associated with particular stop combinations. The crescendo shoe also includes a circuit for adding hysteresis to the crescendo shoe position.The operating program incorporates a debounce routine for eliminating false contact closures caused by switch bounce in the stop tabs such that the switch contacts must remain in a particular state for a number of successive scans before the switch closure will be detected.
    • 4. 发明授权
    • Exhaust gas recirculation diagnostic
    • 废气再循环诊断
    • US5508926A
    • 1996-04-16
    • US265092
    • 1994-06-24
    • David R. Wade
    • David R. Wade
    • F02D41/22F02M25/07F02D43/00F02M25/06
    • F02D41/221F02M26/49F02M26/48F02M26/53
    • Restrictions in a path of flow of recirculated internal combustion engine exhaust gas from an engine exhaust system to an engine intake manifold are diagnosed when the engine is determined to be in a steady state operating condition through a monitoring of the air pressure in the engine intake manifold while the flow of exhaust gas thereto is varied according to a predetermined flow schedule. Changes in the monitored air pressure are determined over a test period, are filtered through a lag filter process having a dynamic filter coefficient, and are compared to a dynamic threshold to determine a presence of a restriction. The filter coefficient and the threshold may be adjusted in accord with the outcome of the diagnostic.
    • 当通过监测发动机进气歧管中的空气压力来确定发动机处于稳定状态运行状态时,诊断从发动机排气系统到发动机进气歧管的再循环内燃机废气的流动路径的限制 同时其排出气体根据预定的流程进行变化。 在测试期间确定监测的空气压力的变化,通过具有动态滤波器系数的滞后滤波器过程进行滤波,并与动态阈值进行比较以确定是否存在限制。 滤波器系数和阈值可以根据诊断结果进行调整。
    • 5. 发明授权
    • Simulating wind noise in electronic organs using digital noise generators
    • 使用数字噪声发生器模拟电子机器中的风噪声
    • US4348931A
    • 1982-09-14
    • US142381
    • 1980-04-21
    • David R. Wade
    • David R. Wade
    • G10H1/14G10H1/02
    • G10H1/14Y10S84/04
    • An electronic musical instrument of the type producing pipe organ-like sounds including a circuit for simulating wind noise by causing a random perturbation from the nominal frequency of tune, which an organ flue pipe exhibits when sounding, through the use of digital noise generators which are utilized to approximate an analog white or random noise source. The digital noise generators produce digital noise signals which are used to frequency modulate the instrument tone generator to produce substantially random perturbations in tbe generator output signal frequency. The present invention may be used with musical instruments having a single tone generator system composed of either a multiplicity of oscillators with a vibrato input, or a top octave frequency generator integrated circuit and a single oscillator with a vibrato input, or a transposer system. Furthermore, the present invention finds utility with multiple generator organ systems where all of the generators may be randomly modulated by independent and unlocked noise signals.
    • 一种产生管状器官状声音的电子乐器,包括用于模拟风噪声的电路,该电路通过使用数字噪声发生器引起来自器官烟道管发出声音的声调标称频率的随机扰动 用于近似模拟白色或随机噪声源。 数字噪声发生器产生数字噪声信号,其用于频率调制仪器音调发生器,以在发生器输出信号频率中产生基本上随机的扰动。 本发明可以与具有单个音调发生器系统的乐器一起使用,该音乐发生器系统由具有颤音输入的多个振荡器或顶部倍频程频率发生器集成电路组成,而具有颤音输入的单个振荡器或转移器系统。 此外,本发明可用于多个发生器器官系统,其中所有发生器可以通过独立和解锁的噪声信号随机调制。