Electrohydraulic distributed control system with identical master and slave controllers
US5249140A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 7, 1991 |
| Grant date | Sep 28, 1993 |
| Priority date | — |
| Expiry date | May 7, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B19/46
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A control module adapted for use as either a master controller or device controller in a distributed electrohydraulic system includes a microprocessor-based control circuit with digital memory having stored therein a plurality of programs for controlling operation of the controller in a variety of applications. A plurality of analog inputs provide a mechanism for connecting sensor signals or the like to input ports of the control microprocessor. A plurality of electrohydraulic valve driver circuits have inputs for receiving valve control signals from the control microprocessor, and outputs for selective connection to electrohydraulic valves coupled to the devices to be controlled. Serial communication circuitry is coupled to the control microprocessor and adapted for connection to a high-speed electrohydraulic bus. A plurality of control routines are prestored in a memory library, as is an executive routine that is employed for operating the microprocessor whether the controller is configured as a master or a device controller. To configure a controller for operation as a master controller or device controller, and to configure the controller for operation in association with a spe…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.