G05D SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
Introduced: September 1968
Classification Context
- Section:
- PHYSICS
- Class:
- CONTROLLING; REGULATING
- Subclass:
- SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
Description
G05D covers automatic control and regulation systems for physical variables that are not primarily electrical in nature, such as temperature, pressure, flow rate, liquid level, speed, and mechanical position. These systems employ various sensing, feedback, and actuating mechanisms—including mechanical, hydraulic, pneumatic, and thermal devices—to maintain desired setpoints or respond to process changes. The class encompasses both continuous regulation systems and systems with discrete control logic implemented through non-electrical means. G05D excludes control systems where the controlled variable is inherently electrical (covered by G05B) and excludes the control systems' electrical or electronic components when classified separately.
Scope Notes
Application references: Control or measuring arrangements specially adapted for combines Control or regulation of milking machines Controlling or regulating processes or operations for continuous casting of metals Automatic control of welding parameters Control systems or devices for copying directly from a pattern or a master model Grinding controlled by patterns, drawings, magnetic tape or the like Control means for lapping machines or devices Measuring or gauging equipment for controlling the feed movement of the grinding tool or work Controlling the flowability, constitution, or other physical characteristics of abrasive blasts Flow- or pressure-control devices or systems for dispensing beverages on draught Control devices specially adapted for fluidised bed combustion apparatus Humidity or temperature control in electrographic, electrophotographic or magnetographic processes Arrangements for controlling dynamo-electric motors or generators
Related Keywords
25 direct subcodes
Child Classifications
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- G05D 1/00 Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots
- G05D 101/00 Details of software or hardware architectures used for the control of position
- G05D 103/00 Adaptations for complying with regulatory restraints on the operations of the controlled vehicles, e.g. compliance with airspace or traffic regulations
- G05D 105/00 Specific applications of the controlled vehicles
- G05D 107/00 Specific environments of the controlled vehicles
- G05D 109/00 Types of controlled vehicles
- G05D 11/00 Control of flow ratio
- G05D 111/00 Details of signals used for control of position, course, altitude or attitude of land, water, air or space vehicles
- G05D 13/00 Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover
- G05D 15/00 Control of mechanical force or stress; Control of mechanical pressure
- G05D 16/00 Control of fluid pressure
- G05D 17/00 Control of torque; Control of mechanical power
- G05D 19/00 Control of mechanical oscillations, e.g. of amplitude, of frequency, of phase
- G05D 21/00 Control of chemical or physico-chemical variables, e.g. pH-value
- G05D 22/00 Control of humidity
- G05D 23/00 Control of temperature
- G05D 24/00 Control of viscosity
- G05D 25/00 Control of light, e.g. intensity, colour or phase
- G05D 27/00 Simultaneous control of variables covered by two or more of main groups
- G05D 29/00 Simultaneous control of electric and non-electric variables