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公开(公告)号：US4631683A
公开(公告)日：1986-12-23
申请号：US645203
申请日：1984-08-29
IPC分类号： B23Q17/22 , G05B19/4065 , G06F15/46 , G01M7/00 , G01N24/04
CPC分类号： G05B19/4065 , G05B2219/37351
摘要： A system and method for monitoring vibrations of a machine tool metal-cutting tool insert and interpreting them to promptly detect the initial touch to the workpiece and signal the tool to stop advancing before marring the surface. The signal generated by a sensor such as an accelerometer is preprocessed to eliminate lower frequency machine noise and detect the energy in a higher frequency band, then sampled and analyzed by digital circuitry. In order to avoid false alarms on high amplitude spiky noise pulses generated by traverse operation of the machine tool, the tool touch alarm is delayed longer than the maximum duration of the noise pulses. Two techniques are given to ignore the noise spikes while still detecting the tool touch signal.
摘要翻译： 一种用于监测机床金属切削刀具插入件的振动的系统和方法，并且解释它们以及时检测对工件的初始触摸并且在损坏表面之前发出信号以停止前进。 由诸如加速度计的传感器产生的信号被预处理以消除较低频率的机器噪声并且检测较高频带中的能量，然后由数字电路采样和分析。 为了避免由机床的横动操作产生的高振幅尖峰噪声脉冲的误报，工具触摸报警延迟时间比噪声脉冲的最大持续时间长。 给出两种技术来忽略噪声尖峰，同时仍然检测到工具触摸信号。
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2.发明授权Vibration-sensing tool break and touch detector optimized for machining conditions 失效针对加工条件优化的振动检测工具断裂和触摸检测器
公开(公告)号：US4724524A
公开(公告)日：1988-02-09
申请号：US744083
申请日：1985-06-12
IPC分类号： B23Q17/09 , G05B19/4065 , G06F15/46 , G08B23/00
CPC分类号： G05B19/4065 , B23Q17/0971 , G05B2219/37351
摘要： A Machine Tool Monitor detects significant cutting tool breakage and the first contact of an advancing tool to a workpiece, and does this by monitoring vibration signals produced by the machining of parts and interpreting patterns in these signals. Information from the part program improves the performance of the detector and optimizes it for the cutting conditions called for by the machine tool control. The analog channel gain of the monitor is adjusted and parameters controlling the digital pattern recognition logic are selected using part program information on machining parameters. The tool touch or tool break detection mode is selected by the part program.
摘要翻译： 机床监视器检测到显着的切割刀具断裂和前进工具对工件的第一次接触，并通过监视由零件的加工产生的振动信号和这些信号中的解释模式来实现。 来自零件程序的信息提高了检测器的性能，并优化了机床控制所要求的切割条件。 调整监视器的模拟通道增益，并使用加工参数的零件程序信息来选择控制数字模式识别逻辑的参数。 通过零件程序选择工具触摸或刀具断点检测模式。
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公开(公告)号：US4642617A
公开(公告)日：1987-02-10
申请号：US685005
申请日：1984-12-21
IPC分类号： B23Q17/09 , G01H1/00 , G05B19/4065 , G08B21/00
CPC分类号： G05B19/4065 , B23Q17/0971 , B23Q17/098 , G01H1/00
摘要： Substantial cutting condition changes that occur gradually, as opposed to the more usual sudden large change, are detected by setting upper and lower cutting noise mean level thresholds. When the mean cutting noise exceeds the upper threshold or stays below the lower threshold for a preset number of signal samples, a tool break alarm is generated. Techniques are given to reduce false alarms at the start and end of the cut and on runout on initial rough surface cuts. The system comprises an accelerometer or other sensor whose signal is preprocessed to attenuate lower frequency machinery noise and detect the signal energy in a band below 100 KHz, then sampled, and the digitized signal samples analyzed by pattern recognition logic.
摘要翻译： 通过设置上下切割噪声平均水平阈值来检测到与逐渐变大的突然变化相反的逐渐发生的重大切割条件变化。 当平均切割噪声超过上限阈值或者对于预设数量的信号样本保持低于下限阈值时，产生刀具断裂报警。 给出了减少开始和结束时以及在初始粗糙表面切割时的跳动上的假警报的技术。 该系统包括加速度计或其他传感器，其信号被预处理以衰减较低频率的机械噪声并检测低于100KHz的频带中的信号能量，然后采样，并且通过模式识别逻辑分析数字化信号样本。
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4.发明授权
公开(公告)号：US4636780A
公开(公告)日：1987-01-13
申请号：US664188
申请日：1984-10-24
IPC分类号： B23Q17/09 , B23B47/24 , G05B19/4065 , G08B21/00
CPC分类号： G05B19/4065 , B23Q17/0971 , B23Q17/098 , G05B2219/37432 , G05B2219/37525
摘要： This tool break detection system relies on monitoring changes in the cutting noise itself, rather than detecting the tool fracture acoustic signal. A broken tool capable of damaging the workpiece is detected, and tool break events that do not affect cutting conditions are ignored. The signal from a sensor such as an accelerometer is preprocessed to attenuate low frequency machinery noise and detect the signal energy in a band below 100 KHz, then sampled, and the digitized signal samples analyzed by pattern recognition logic. Runout false alarms during rough surface cutting are prevented; after detection of an abrupt increase or decrease in signal level, the confirmation period to test for a persistent shift in mean level is set longer than the workpiece revolution period.
摘要翻译： 该断屑检测系统依赖于监测切割噪声本身的变化，而不是检测工具断裂声信号。 检测到能够损坏工件的破损刀具，忽略不影响切削条件的刀具断裂事件。 来自诸如加速度计的传感器的信号被预处理以衰减低频机械噪声并检测低于100KHz的频带中的信号能量，然后采样，并且通过模式识别逻辑分析数字化信号样本。 防止粗糙表面切割过程中的跳动误报; 在检测到信号电平的突然增加或减小之后，将平均电平的持续移位测试的确认期间设定为比工件转动周期长。
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5.发明授权Detection by automatic gain control features of gradual cutting tool breakage 失效通过自动增益控制检测功能，逐步切割刀具断裂
公开(公告)号：US4806914A
公开(公告)日：1989-02-21
申请号：US46812
申请日：1987-05-07
IPC分类号： B23Q17/09 , G01H1/16 , G05B19/4065 , G08B21/00
CPC分类号： G01H1/16 , B23Q17/0957 , B23Q17/0971 , G05B19/4065 , G05B2219/37351
摘要： A tool break detection system has an automatic gain control to adjust the analog signal channel gain and hold the cutting vibration signal at a desired average level. The AGC time constant is long enough that the detection of abrupt tool breaks and sudden large signal level transistions by the digital signature recognition logic is unaffected. However, the gradual decrease in signal level produced by a crumbly-type break would be removed by AGC action. In a system with a hardware AGC, crossing a high gain threshold resets gain to a low value and the resulting abrupt and persisting change in signal level is detected by the abrupt tool break logic. Another embodiment uses the gain command output by a software AGC and generates a break detected signal directly, without resetting the gain command, as gain rises above a high gain alarm level which is recalculated at the start of each cut.
摘要翻译： 刀具断裂检测系统具有自动增益控制，以调整模拟信号通道增益并将切割振动信号保持在期望的平均水平。 AGC时间常数足够长，使得数字签名识别逻辑的突然工具断开检测和突发的大信号电平转移不受影响。 然而，通过AGC动作可以消除由脆弱型断路产生的信号电平的逐渐降低。 在具有硬件AGC的系统中，跨越高增益阈值将增益重置为低值，并且突然的工具断开逻辑检测到所产生的信号电平的突然和持续变化。 另一个实施例使用由软件AGC输出的增益指令，并且当增益高于在每次切断开始时重新计算的高增益警报水平时，直接生成中断检测信号而不复位增益命令。
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公开(公告)号：US4388566A
公开(公告)日：1983-06-14
申请号：US235191
申请日：1981-02-17
IPC分类号： H05B41/392 , G05F1/00
CPC分类号： H05B41/3921 , Y10S315/04
摘要： A passive control network for connection between a pair of load output level setting terminals, as on a ballast for a dimmable fluorescent lamp in a lighting system, to provide a required variable impedance, where the magnitude of the impedance establishes the load output level. The passive control network includes an isolation transformer for coupling a periodic waveform at the load input terminals to the variable impedance component, the magnitude of which impedance is reflected through the transformer to provide the load level-setting impedance.
摘要翻译： 用于连接一对负载输出电平设置端子的无源控制网络，如在照明系统中用于可调光荧光灯的镇流器，以提供所需的可变阻抗，其中阻抗的大小建立负载输出电平。 无源控制网络包括隔离变压器，用于将负载输入端子处的周期性波形耦合到可变阻抗分量，其阻抗的大小通过变压器反射以提供负载电平设置阻抗。
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公开(公告)号：US4345200A
公开(公告)日：1982-08-17
申请号：US242782
申请日：1981-03-11
CPC分类号： H02M5/297
摘要： A circuit, for controlling the output level of a load circuit connected thereto, has a single input for receiving a control signal to provide both a selectable level on/off output signal at a first output connected to an on/off terminal of the load circuit, and a pair of essentially equal control currents drawn in shunt from a pair of output terminals connected to load output-level-setting input terminals. The shunt control currents are provided by a current-mirror circuit having a pair of substantially identical current sinks, each responsive to an input signal applied thereto in parallel from the single control circuit input.
摘要翻译： 用于控制与其连接的负载电路的输出电平的电路具有用于接收控制信号的单个输入，以在连接到负载电路的开/关端的第一输出端提供可选择的电平开/关输出信号 以及从连接到负载输出电平设置输入端子的一对输出端子分流引出的一对基本上相等的控制电流。 分流控制电流由具有一对基本上相同的电流吸收器的电流镜电路提供，每个电流检测器响应于从单个控制电路输入并行施加到其上的输入信号。
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公开(公告)号：US4484190A
公开(公告)日：1984-11-20
申请号：US267327
申请日：1981-05-26
申请人： James F. Bedard
发明人： James F. Bedard
CPC分类号： H05B37/029
摘要： A system for programmable controlling the output level of at least one load, utilizes an isolated receiver-controller located adjacent to the load and receiving control data from at least one transmitter, which may be at a location remote from the load location. The transmitted data includes an address portion, identifying that particular one of a plurality of loads having the corresponding local address, and a command data portion, establishing both the on/off condition and the output level of the addressed load. Local control may be temporarily substituted for remote control. The output level is controlled by programmably varying the magnitude of an impedance coupled to a pair of load input terminals.
摘要翻译： 用于可编程控制至少一个负载的输出电平的系统利用位于负载附近的隔离的接收器控制器，并且接收来自至少一个发射器的控制数据，该发射器可以位于远离负载位置的位置。 发送的数据包括识别具有对应的本地地址的多个负载中的特定一个的地址部分和建立所寻址的负载的开/关条件和输出电平两者的命令数据部分。 本地控制可能暂时取代远程控制。 输出电平通过可编程地改变耦合到一对负载输入端子的阻抗的大小来控制。
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公开(公告)号：US4435679A
公开(公告)日：1984-03-06
申请号：US479048
申请日：1983-05-12
CPC分类号： G08C19/025 , H03G3/001
摘要： A circuit, for providing a periodic signal of programmably controllable amplitude, includes an oscillator having a substantially constant amplitude signal of desired frequency and waveform at an output thereof connected to the input of a first programmable voltage divider having its output connected to one input of an operational amplifier. The remaining operational amplifier input is connected to the output thereof via a second programmable voltage divider used as a programmably controllable feedback network. The operational amplifier output signal amplitude may be controlled by external data signals to values less than, equal to, and greater than, the substantially constant oscillator waveform amplitude. Both computer and hard-wired circuitry for controlling the output signal are disclosed. An isolation-and-rectification network may be used to recover a D.C. voltage of programmably controlled amplitude.
摘要翻译： 用于提供可编程可控幅度的周期性信号的电路包括具有所需频率的基本上恒定的振幅信号的振荡器，其输出端连接到第一可编程分压器的输出，该第一可编程分压器的输出连接到 运算放大器。 剩余的运算放大器输入经由用作可编程可控反馈网络的第二可编程分压器连接到其输出端。 运算放大器输出信号幅度可以由外部数据信号控制到小于等于并且大于基本恒定的振荡器波形振幅的值。 公开了用于控制输出信号的计算机和硬连线电路。 隔离和整流网络可用于恢复可编程控制振幅的直流电压。
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10.发明授权
公开(公告)号：US4683570A
公开(公告)日：1987-07-28
申请号：US771852
申请日：1985-09-03
申请人： James F. Bedard , Vilay C. Jaswa
发明人： James F. Bedard , Vilay C. Jaswa
CPC分类号： G06F11/1604 , G06F11/187 , G06F11/0757
摘要： A self-checking detector for detecting faults in a multiple redundant clock system includes a majority voter circuit for receiving the clock signals from the redundant clock circuits and for providing a voted output, a comparison circuit for comparing each of the clock signals with the voted output, and failure signal producing circuits responsive to the outputs from the comparison circuit for producing a first failure signal upon a clock failure being detected and for producing a second failure signal upon a failure of the majority voter being detected. The detector further includes power-up reset circuitry for inhibiting its operation during a power-up interval, and a reset circuit enabling either automatic or manual reset of the detector for verification of the detected fault.
摘要翻译： 用于检测多重冗余时钟系统中的故障的自检检测器包括用于从冗余时钟电路接收时钟信号并提供投票输出的多数选择电路，用于将每个时钟信号与投票输出进行比较的比较电路 以及响应于来自比较电路的输出的故障信号产生电路，用于在检测到时钟故障时产生第一故障信号，并且在大多数选民被检测到故障时产生第二故障信号。 检测器还包括用于在上电间隔期间禁止其操作的上电复位电路，以及启用检测器的自动或手动复位以检测检测到的故障的复位电路。
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