ground loop

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ground loop

[′grau̇nd ‚lüp]
(aerospace engineering)
A sharp, uncontrollable turn made by an aircraft on the ground during landing, taking off, or taxiing.
(communications)
Return currents or magnetic fields from relatively high-powered circuits or components which generate unwanted noisy signals in the common return of relatively low-level signal circuits.
(electricity)
Potentially detrimental loop formed when two or more points in an electric system that are nominally at ground potential are connected by a conducting path.

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Simplex burner.
i. An uncontrolled turn on the ground either on takeoff or, more often, on landing in a tail-wheel aircraft. Also called a ground loop
ii. To turn a propeller by hand to start the engine.
iii. To calibrate compass deviation by recording its values at predetermined intervals and correcting the deviation to the extent possible.
iv. The sudden yaw of a multiengine airplane when one of the engines, especially the one away from the centerline, fails.
v. In aerial photography, it is the angle measured in the plane of the photograph from the positive y-axis clock-wise to the nadir point.

ground loop

A circular path created between the data lines and the ground wires when electronic devices communicate with each other. When systems have earth grounds through different power sources, differences in reference voltages can cause problems for various reasons (see inter-system ground noise). See ground.


The Ground Loop
The ground loop is created because all the equipment is wired to earth ground.
References in periodicals archive ?
Data Collection System Components Data Point Location Range and Accuracy Ground Within and around -20[degrees]C to temperatures the ground loop 80[degrees]C [+ or -] 0.
Acromag adds an enhanced version of their USB-configured thermocouple / millivolt input transmitters with an isolation barrier to protect from surges, reduce noise, and eliminate ground loop errors.
The average of these two instantaneous temperature readings is usually taken to represent the average temperature in the vertical ground loop at a given time.
Acromag's new compact USB-Isolator provides a protective barrier between connected USB devices to prevent equipment damage or errors from ground loops, high-voltage spikes, or conducted noise.
The dielectrically isolated device eliminates troublesome and noisy ground loops from developing between the actuator and the analog inputs.
The data communications in industrial environments can present special problems; the systems must be able to function in the presence of electrical transients and noise, ground loops, and surges from nearby lightning strikes.
Off peak loads should be determined since ground loops can be arranged to take advantage of load diversity among zones that peak at different times.
Built-in self-diagnostic routines function when the system is operating, and four-way isolation separates inputs, outputs, relays, and power from each other to prevent ground loops and protect equipment from high-voltage transients.
This standard provides documentation for multi-room audio installers, including client labeling and considerations for multiple systems, multiple buildings, grounding and ground loops, and power feeds.
Fiber is the cabling media of choice in industrial networking because of its superiority in areas such as noise-immunity, distance, security, bandwidth, ground loops control, and overall network reliability.
The non-polarized inputs can monitor 5-30VDC and provide optical isolation to protect the host computer and other sensitive equipment from voltage transients and ground loops that are common in industrial environments.