collision detection

(redirected from Collision checking)

collision detection

[kə′lizh·ən di‚tek·shən]
(computer science)
A procedure in which a computer network senses a situation where two computer devices attempt to access the network at the same time and blocks the messages, requiring each device to resubmit its message at a randomly selected time.

collision detection

A class of methods for sharing a data transmission medium in which hosts transmit as soon as they have data to send and then check to see whether their transmission has suffered a collision with another host's.

If a collision is detected then the data must be resent. The resending algorithm should try to minimise the chance that two hosts's data will repeatedly collide. For example, the CSMA/CD protocol used on Ethernet specifies that they should then wait for a random time before re-transmitting.

See also backoff.

This contrasts with slotted protocols and token passing.
References in periodicals archive ?
The new version of PowerINSPECT makes it easier to complete fast and accurate inspection of complex assemblies, with improvements to the user interface, more options for automatic feature extraction for point cloud batch inspection, automation of inspection sequences, including automated probe changes, and greater control over collision checking
PowerMILL collision checking for five-axis machining uses color codes to warn of near misses, depending on user-specified clearances.
Rights Management provides powerful configuration capabilities, collision checking, automated versioning and approvals.
When they were run by EEW, PowerMILL fully justified the confidence placed in the software's ability to calculate the residual material model and to undertake collision checking of the milling machine.
Collision checking is integral, as is machining, which is tied to either step-over or constant scallop height.
Included are ISOGEN Isometrics, CADWorx Plant Professional, CADWorx Design Review, live database links, links to stress analysis, specification-driven modeling, collision checking and intelligent point-cloud-to-modeling capabilities.
Other roughing improvements include the ability to take into account any remaining stock on the model during holder collision checking, ensuring that Z-level roughing toolpaths are completely free of tool-holder collisions.
Support for all standard tools with collision checking, avoidance, toolpath containment -- and more.
PowerMILL 5 features a streamlined user interface, new opportunities for programming automation, together with improved rest roughing, variable thickness machining, and more comprehensive collision checking.
Also improved are the placement and representation of piping insulation for more accurate collision checking, bills of material and insulation weights.

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