-
公开(公告)号：US4032915A
公开(公告)日：1977-06-28
申请号：US598314
申请日：1975-07-23
申请人： John L. Shanks , Randol R. Read , John W. Supernaw
发明人： John L. Shanks , Randol R. Read , John W. Supernaw
CPC分类号： G11B20/1411
摘要： This disclosure describes a decoding system for decoding and formatting digital data recorded on magnetic tape in the STR ("speed-tolerant recording") format. The digital words are stored in cells of about equal width except that the leading cell of each word, called a "sync" cell, is of double width. Each cell starts with a positive pulse, and a cell detector provides a signal each time this occurs. The apparatus includes a data detector, which analyzes the width of this positive pulse relative to the cell width to determine whether the cell is a 1 bit or a 0 bit. Since the measurement is relative, cell length, i.e., total cell time, is not important. The bit determination is loaded into a shift register. Other apparatus determines the width of the cell, so that a sync cell detector can determine whether a sync cell is present or not. When a sync cell is detected, a pulse is generated which actuates the output buffer register to load the bits from the shift register. Data flows from buffer to a computer.
-
公开(公告)号：US4594692A
公开(公告)日：1986-06-10
申请号：US508303
申请日：1983-06-27
申请人： Randol R. Read , John W. Supernaw
发明人： Randol R. Read , John W. Supernaw
CPC分类号： G01V13/00
摘要： A system for testing seismic signal recording equipment wherein a test signal is generated which simulates the output of at least one seismic sensing device, and, thereafter, the test signal is applied to the seismic signal recording equipment. The test signal is recorded by the seismic signal recording equipment and the recorded signal is compared with the generated test signal to evaluate the performance characteristics of the seismic signal recording equipment. The system can include circuitry to vary component elements of the test signal to test different performance characteristics of the seismic signal recording equipment, as well as ability to generate a random noise signal for addition to the test signal.
摘要翻译： 一种用于测试地震信号记录设备的系统，其中产生模拟至少一个地震检测设备的输出的测试信号，此后，测试信号被施加到地震信号记录设备。 测试信号由地震信号记录设备记录，记录信号与产生的测试信号进行比较，以评估地震信号记录设备的性能特征。 该系统可以包括用于改变测试信号的组成元件以测试地震信号记录设备的不同性能特征的电路，以及产生用于添加到测试信号的随机噪声信号的能力。
-
公开(公告)号：US4027281A
公开(公告)日：1977-05-31
申请号：US619424
申请日：1975-10-03
CPC分类号： H03G3/3026 , G01V1/247 , G01V1/48
摘要： The analog signals provided by a seismic-velocity well logger, resulting from the transmission of seismic impulses from a transmitter to a receiver in a logging sonde in a well by paths that include travel through the rock walls of the borehole, are digitally recorded. These seismic impulses and the resulting received seismic signals, or traces, are repeated approximately 20 times per second. The recording apparatus digitizes these analog traces by determining signal amplitudes at intervals of approximately 10 microseconds and temporarily stores the digital values. The apparatus includes a programmable-gain amplifier, an analog-to-digital converter, a computer, and a memory in which are, in addition to the data, also stored the values of gain which are to be used in digitizing the next signal. That is, on each digitizing interval a stored gain "program" is read out of the computer and sets the gain of the amplifier. Besides transferring the stored data to a standard computer input tape, a digital-to-analog converter and a scope are provided for displaying the successive values of gain and digitized signal, for monitoring the operation of the apparatus.
摘要翻译： 由地震速度测井仪提供的模拟信号是通过包括穿过钻孔岩壁的路径从井中测井仪中的发射器传输到接收器而产生的模拟信号，是数字记录的。 这些地震脉冲和由此产生的接收的地震信号或迹线每秒重复大约20次。 记录装置通过以大约10微秒的间隔确定信号幅度来数字化这些模拟迹线，并临时存储数字值。 该装置包括可编程增益放大器，模数转换器，计算机和存储器，其中除了数据之外，还存储了将用于数字化下一个信号的增益值。 也就是说，在每个数字化间隔上，从计算机读出存储的增益“程序”，并设置放大器的增益。 除了将存储的数据传送到标准计算机输入磁带之外，还提供了数模转换器和示波器，用于显示增益和数字化信号的连续值，用于监视装置的操作。
-
公开(公告)号：US4054947A
公开(公告)日：1977-10-18
申请号：US595960
申请日：1975-07-14
申请人： John L. Shanks , Everett L. Cox , John W. Supernaw
发明人： John L. Shanks , Everett L. Cox , John W. Supernaw
CPC分类号： G11B20/1205 , G11B2020/1087 , G11B2020/10879 , G11B2220/90
摘要： An interface for coupling a computer to a plurality of magnetic tape transports, including dual-density transports and combinations of high and low density transports. The interface includes an automatic density selector for detecting the density of data stored on a tape prior to reading and for storing this information for as long as the tape is being used. A read-only memory and other logic circuitry translate computer operating commands into commands readable by a transport formatter. The interface also couples digital data between the computer and the formatter and converts formatter status information into language readable by the computer.
摘要翻译： 一种用于将计算机耦合到多个磁带传输器的接口，包括双重密度传输以及高密度和低密度传输的组合。 该接口包括一个自动浓度选择器，用于在读取之前检测存储在磁带上的数据的密度，并且只要磁带被使用就存储该信息。 只读存储器和其他逻辑电路将计算机操作命令转换为可由传输格式化器读取的命令。 该接口还将计算机和格式化器之间的数字数据耦合，并将格式化器状态信息转换为计算机可读的语言。
-
-
-
搜索结果
4 条记录 (耗时 0.018 秒)
