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公开(公告)号：US5652512A
公开(公告)日：1997-07-29
申请号：US636420
申请日：1996-04-23
申请人： Paul L. Feintuch , Eric K. Slater , Kirk Kohnen
发明人： Paul L. Feintuch , Eric K. Slater , Kirk Kohnen
摘要： Digital logic comprising a high speed analog to digital converter, a high speed analog to digital converter, a digital multiplier, and an infinite impulse response filter and decimation circuit are used to digitize a magnetic signal that is subsequently processed by magnetic data processing algorithms. The high resolution digital to analog converter is directly incorporated in a feedback loop of a magnetometer sensor, and an expensive precision analog to digital converter is replaced by a less expensive, lower power digital to analog converter. The improvement provided by the present invention includes a high speed analog to digital converter coupled between the oscillator and a first input of a multiplier, and a second analog to digital converter that is coupled between the sense coil of the sensor and a second input of the multiplier. The output of the multiplier is coupled to an infinite impulse response filter and decimation circuit that produces the digital output signal from the magnetometer. The output of the infinite impulse response filter and decimation circuit is coupled by way of a digital to analog converter to the feedback coil of the sensor. Depending on the system requirements, the two analog to digital converters, the digital multiplier, and the infinite impulse response filter and decimation circuit may be implemented in one readily available microcontroller at low cost. This serves to reduce the number of components, complexity, and expense of the magnetometer.
摘要翻译： 使用包括高速模数转换器，高速模数转换器，数字乘法器和无限脉冲响应滤波器和抽取电路的数字逻辑来数字化随后由磁数据处理算法处理的磁信号。 高分辨率数模转换器直接并入到磁力计传感器的反馈回路中，昂贵的精密模数转换器由较便宜的低功耗数模转换器代替。 本发明提供的改进包括耦合在振荡器和乘法器的第一输入端之间的高速模数转换器和耦合在传感器的感测线圈和第二输入端之间的第二模数转换器 乘数。 乘法器的输出耦合到产生来自磁力计的数字输出信号的无限脉冲响应滤波器和抽取电路。 无限脉冲响应滤波器和抽取电路的输出通过数模转换器耦合到传感器的反馈线圈。 根据系统要求，可以在一个容易获得的微控制器中以低成本实现两个模数转换器，数字乘法器和无限脉冲响应滤波器和抽取电路。 这用于减少磁力计的部件数量，复杂性和费用。
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公开(公告)号：US5696575A
公开(公告)日：1997-12-09
申请号：US636617
申请日：1996-04-23
申请人： Kirk Kohnen , Eric K. Slater
发明人： Kirk Kohnen , Eric K. Slater
摘要： Digital logic and a high resolution digital to analog converter are used to adequately digitize a magnetic signal that is subsequently processed by magnetic data processing algorithms. The high resolution digital to analog converter is directly incorporated in a feedback loop of a magnetometer sensor, an expensive precision analog to digital converter is replaced by a less expensive, lower power digital to analog converter. The circuit improvement provided by the present invention includes an analog low pass filter coupled to the sensor, a digital logic circuit coupled to the analog low pass filter for providing an output signal from the magnetometer and a feedback output signal, and the digital to analog converter coupled between the digital logic circuit and a feedback coil of the sensor for coupling the feedback output signal thereto. The digital logic circuit includes an analog to digital converter, an adder having a first input coupled to the analog to digital converter, and an accumulator coupled between an output of the adder and a second input of the adder. The digital logic circuitry processes the error signal from the analog multiplier, eliminates high frequency components, and digitizes the result. Thus, a low resolution analog to digital converter, having a resolution of only a few bits, may be used.
摘要翻译： 数字逻辑和高分辨率数模转换器用于对随后由磁数据处理算法处理的磁信号进行适当数字化。 高分辨率数模转换器直接结合在磁力计传感器的反馈回路中，昂贵的精密模数转换器由较便宜的低功耗数模转换器代替。 由本发明提供的电路改进包括耦合到传感器的模拟低通滤波器，耦合到模拟低通滤波器的数字逻辑电路，用于提供来自磁力计的输出信号和反馈输出信号，以及数模转换器 耦合在数字逻辑电路和用于将反馈输出信号耦合的传感器的反馈线圈之间。 数字逻辑电路包括模数转换器，具有耦合到模数转换器的第一输入端的加法器和耦合在加法器的输出端和加法器的第二输入端之间的累加器。 数字逻辑电路处理来自模拟乘法器的误差信号，消除高频分量，并对结果进行数字化。 因此，可以使用具有仅几比特的分辨率的低分辨率模数转换器。
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公开(公告)号：US5818353A
公开(公告)日：1998-10-06
申请号：US639230
申请日：1996-04-29
CPC分类号： G01C9/00 , Y10T74/1257
摘要： Self leveling apparatus that includes a frame, a device that is to be leveled, and a leveling mechanism such as a double ring gimbal having an inner gimbal ring and an outer gimbal ring. The outer gimbal ring is secured to the frame and the inner gimbal ring is secured to the device and to the outer ring. The inner ring comprises a viscous or preloaded bearing that allows the device to swing around an inner ring axle to thereby level itself in that axis and prevent spurious movement of the device. The outer gimbal ring and inner gimbal ring are attached by outer axles that comprise a viscous or preloaded bearing that allow the inner gimbal ring to swing around the outer axles thereby level the inner gimbal ring in that axis and prevent spurious movement of the device. A disclosed embodiment of the invention includes a magnetometer sensor that is coupled to signal processing and telemetry electronics and a power source that are leveled to keep axes of the sensor oriented along horizontal and vertical axes.
摘要翻译： 自动调平装置，包括框架，待平整的装置，以及诸如具有内万向节环和外万向节环的双环万向节的调平机构。 外部万向环固定在框架上，内部万向环固定在设备和外圈上。 内环包括粘性或预加载的轴承，其允许装置围绕内环轴线摆动，从而在该轴线上自平衡并防止装置的杂散运动。 外万向节环和内万向节环由外轴连接，外轴包括一个允许内万向节环围绕外轴摆动的粘性或预载轴承，从而在该轴上平衡内万向环，并防止装置发生杂散运动。 本发明的公开的实施例包括耦合到信号处理和遥测电子装置的磁力计传感器和被调平以使传感器的轴沿着水平轴和垂直轴定向的电源。
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公开(公告)号：US5939881A
公开(公告)日：1999-08-17
申请号：US968597
申请日：1997-11-13
申请人： Eric K. Slater , Kirk K. Kohnen
发明人： Eric K. Slater , Kirk K. Kohnen
摘要： An improved digital fluxgate magnetometer that uses digital logic and a high resolution digital to analog converter to digitize a magnetic signal for use by signal processing algorithms. The magnetometer includes an oscillator that outputs an oscillator signal and a magnetic fluxgate sensor having a drive coil coupled to the oscillator, a feedback coil, and a sense coil. An analog multiplier is coupled to the sense coil and the oscillator and outputs a signal to an analog low pass filter. A comparator is coupled to the analog multiplier, and a register is coupled to the comparator and outputs a logical 1 or a logical 0 in accordance with the output of the comparator. A digital filter receives the output of the register and produces a digital output of the digital fluxgate magnetometer. A high resolution digital to analog converter is coupled between the register and the feedback coil of the magnetic fluxgate sensor in a feedback loop of the sensor. The digital to analog converter produces a very high resolution digitized output (typically >22 bits) that is necessary to adequately represent the dynamic range of the sensor.
摘要翻译： 一种改进的数字磁通门磁强计，其使用数字逻辑和高分辨率数模转换器来数字化磁信号以供信号处理算法使用。 磁力计包括输出振荡器信号的振荡器和具有耦合到振荡器的驱动线圈，反馈线圈和感测线圈的磁通门传感器。 模拟乘法器耦合到感测线圈和振荡器，并将信号输出到模拟低通滤波器。 比较器耦合到模拟乘法器，并且寄存器耦合到比较器并根据比较器的输出输出逻辑1或逻辑0。 数字滤波器接收寄存器的输出并产生数字磁通门磁力计的数字输出。 在传感器的反馈回路中，高分辨率数模转换器耦合在寄存器和磁通门传感器的反馈线圈之间。 数模转换器产生非常高分辨率的数字输出（通常> 22位），这足以表示传感器的动态范围。
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5.发明授权Microprocessor controlled PPI sweep generator with automatic distribution of real-time video and synthetic display loads 失效微处理器控制的PPI扫描发生器，具有实时视频和合成显示负载的自动分配
公开(公告)号：US4307396A
公开(公告)日：1981-12-22
申请号：US139047
申请日：1980-04-10
申请人： Eric K. Slater
发明人： Eric K. Slater
摘要： An improved method and apparatus for controlling the display of a plan position indicator radar display are disclosed which result in the elimination of both display flicker and the loss of critical real-time radar return data. The system is clocked by a series of fixed pulses related to the length of the radar beam on the display. Creation of the radar beam is given top system priority. Thereafter, the number of clock pulses allocated for radar beam creation is diminished as necessary to provide time for the display of prestored synthetic display data. The time is taken from a portion of each beam which has been preselected as least critical. Additionally, the beam length based clock pulses are employed to compensate for sweep overlap and in such functions as offset, range scale, and sweep off-scale.
摘要翻译： 公开了一种用于控制平面位置指示器雷达显示器的显示的改进的方法和装置，其导致消除显示闪烁和关键实时雷达返回数据的丢失。 该系统由与显示器上的雷达波束的长度相关的一系列固定脉冲计时。 雷达波束的创建给出了系统优先级。 此后，分配用于雷达波束创建的时钟脉冲的数量被减少，以便为显示预先存储的合成显示数据提供时间。 时间取自已被预选为最不重要的每个光束的一部分。 另外，采用基于光束长度的时钟脉冲来补偿扫描重叠，并且在诸如偏移，范围标度和扫描偏移的功能中。
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