This abstract describes a system for acquisition of analog signals at a plurality of sensors, carrying these signals in goups of M channels to each of N spaced-apart array terminals, processing each signal in the array terminals by separately amplifying, adding to a shifting function of selected amplitude, axis-crossing-coding these sum signals and storing as single bit pulses, one for each channel, in a parallel-to-serial converter. Each of the converters in each of the array terminals are operatively connected in series and to an array controller, which also controls a disc magnetic recorder to run at constant speed. The disc generates a disc clock, and responsive to the disc clock the converters are read out in series as a sequential train of MN bits and stored on the disc. Successive samples at subsequent digitizing intervals are stored on the disc, to form a first record. Subsequent records are processed, coded and recorded, and composited with previous records on the disc. After a plurality of records have been composited the stacked series is read off the disc in demultiplexed form, and stored in a computer memory. The resulting traces are than processed by a computer and FFT box.
An automated seismic processing system and method are disclosed, including an array of CMOS microprocessors for unattended battery-powered processing of a multi-station network. According to a characterizing feature of the invention, each channel of the network is independently operable to automatically detect, measure times and amplitudes, and compute and fit Fast Fourier transforms (FFT's) for both P- and S- waves on analog seismic data after it has been sampled at a given rate. The measured parameter data from each channel are then reviewed for event validity by a central controlling microprocessor and if determined by preset criteria to constitute a valid event, the parameter data are passed to an analysis computer for calculation of hypocenter location, running b-values, source parameters, event count, P- wave polarities, moment-tensor inversion, and Vp/Vs ratios. The in-field real-time analysis of data maximizes the efficiency of microearthquake surveys allowing flexibility in experimental procedures, with a minimum of traditional labor-intensive postprocessing. A unique consequence of the system is that none of the original data (i.e., the sensor analog output signals) are necessarily saved after computation, but rather, the numerical parameters generated by the automatic analysis are the sole output of the automated seismic processor.
An interactive plural head laser disc system is characterized by pairs of head arrays installed on both sides of one or more laser discs. The heads may be accessed by either multiple or single users to independently and simultaneously access a single disc or plurality of discs. Each head array includes a plurality of read heads formed on a substrate to be in registry with the tracks of data on the discs to enable the reading of all tracks simultaneously and independently.
The method and apparatus of the present invention are described in which connection (and disconnection) of a plurality of geophones associated with a series of stations of a digital seismic data acquisition system is greatly simplified without sacrificing flexibility as to the number of geophone flyers per station or the interval spacing per station and also without the addition of separate subcabling in the internal linkage of the flyer to the field digitizing equipment. The method utilizes a multiple-phone flyer-jumper connected to one channel of a series of channels of a remote data acquisition and telemetering circuit (RDATC). Each RDATC acts in combination with a group of geophone flyers, say 1, 2, 3, etc., to store, amplify, filter, gain control and digitize analog data from each group of flyers and then telemeter the data to recording circuitry in the field truck. Each flyer group can be flexibly made up of two, three, four or more flyer-jumpers; each flyer-jumper includes a central multi-conductor cable segment terminating at each of its ends in the central leg of multi-armed connector. A plurality of series/parallel connected geophones, say 9 in number are used in combination with the central segment. At the end of the arms of each multi-armed connector pass another conductor cable segment (similar to the central segment, but called the "branch cable segment") in which only two of the cables are actively connected to the selected conductor pairs of the central segment. At the other end of each branch cable is a hermaphroditic connector paralleling them electrically. Repairs to flyer-jumper in the field is relatively simple. Of interest: each hermaphroditic connector is color coded to facilitate geophone flyer-jumper field setup and connection in a variety of arrangements with a minimum of helper mix up.
A press management and analysis system, embodies a press console (PMA), one for each press, which is located adjacent the press, and communicating with a remote entry computer (REC). The PMA monitors sensor devices on the press, to follow press operation from the beginning of a job assignment through makeready operations and printing operations to completion. A REC console remote from the press room, as in the production manager's office, communicates with each PMA, and recording (filing), hard copy printing, and like functions are handled at the REC console. The system provides displays requiring completion by the pressman/operator (or manager) thus soliciting information as well as informing all concerned of job progress, of standard times expected for a job, and of transfer from one mode or phase of the job, as from makeready time to run time in which good product is printed. The system feeds back and records event messages, and encourages operator input and identification of stoppage reasons, etc. The system also retains coefficients used along with input job data, to calculate standard times for a job of given magnitude. The results of such calculations appear in appropriate displays as standards against which actual times are compared, and to emphasize when projected or actual time exceeds calculated standard time. All filed information is available for management analysis of press operation as reports compiling desired data and all information may also be communicated to a host computer for storage and/or further analysis.
The method utilizes a multiple-phone flyer-jumper connected to one channel of a series of channels of a remote data acquisition and telemetering circuit (RDATC). Each RDATC acts in combination with a group of geophone flyers, say 1, 2, 3, etc., to store, amplify, filter, gain control and digitize analog data from each group of flyers and then telemeter the data to recording circuitry in the field truck. Each flyer group can be flexibly made up of two, three, four or more flyer-jumpers; each flyer-jumper includes a central multi-conductor cable segment of say N+1 conductors, where N is an even positive number greater than two, terminating at each of its ends in the central leg of multi-armed connector. A plurality of series/parallel connected geophones, say nine in number are used in combination with the central segment. At the ends of the arms of each multi-armed connector pass another conductor cable segment (similar to the central segment, but called the "branch cable segment") in which only two of the cables are actively connected to the selected conductor pairs of the central segment. At the other end of each branch cable is a hermaphroditic connector including a 2 male-2 female combination, with connection occuring between 1 male-1 female subunit by paralleling them electrically. In that way the three geophone conductors of the central cable segment can be flexibly connected to 1, 2, 3, etc., or more similarly located connectors of other flyer-jumpers to increase signal response of the resulting flyer group.
